Did you just find a download or a file on your computer that has a digital signature from Browser Distribution Services, Inc.? Some of the security products refers to the detected files as a variant of Win32/Distromatic.A and Adware.Downware.1243. The detection rate for the Browser Distribution Services, Inc. files collected here is 6%. Please read on for more details.
You will typically see Browser Distribution Services, Inc. when double-clicking to run the file. The publisher name is displayed as the "Verified publisher" in the UAC dialog as the screenshot shows:

You can view additional details from the Browser Distribution Services, Inc. certificate with the following procedure:
Here's a screencap of a file that has been digitally signed by Browser Distribution Services, Inc.:

As you can see in the screencap above, Windows reports that "This digital signature is OK". This implies that the file has been published by Browser Distribution Services, Inc. and that no one has tampered with the file.
If you click the View Certificate button shown in the screencap above, you can view all the details of the certificate, such as when it was issued, who issued the certificate, how long it is valid, and so on. You can also see the address for Browser Distribution Services, Inc., such as the street name, city and country.
COMODO Code Signing CA 2 has issued the Browser Distribution Services, Inc. certificates. You can also examine the details of the issuer by clicking the View Certificate button shown in the screenshot above.
The following are the Browser Distribution Services, Inc. files I have gathered, thanks to the FreeFixer users.
| Detection Ratio | File Name |
|---|---|
| 5/46 | search_protect.exe |
| 8/48 | distro-search-protect-fix-3[1] |
| 6/47 | distro-abb-fix[1] |
| 1/47 | zplugins.dll |
| 1/53 | zplugins.dll |
| 0/48 | toolbarupdaterservice.exe |
Here is the detection names for the Browser Distribution Services, Inc. files. I've grouped the detection names by each scanner engine. Thanks to VirusTotal for the scan results.
| Scanner | Detection Names |
|---|---|
| Antiy-AVL | Trojan/Win32.Agent.gen |
| ClamAV | Trojan.Kazy-3518 |
| DrWeb | Adware.Downware.1243 |
| ESET-NOD32 | a variant of Win32/Distromatic.A, Win32/Distromatic.C |
| Kingsoft | Win32.Troj.Generic.a.(kcloud) |
| Malwarebytes | PUP.Optional.Searchprotect |
| PCTools | SecurityRisk.Dropper |
| Sophos | Generic PUA DN |
| TrendMicro-HouseCall | TROJ_GEN.F47V1018 |
| VBA32 | suspected of Trojan.Downloader.gen.h |
| nProtect | Adware/W32.Agent.1153112 |
The detection percentage is based on the fact that I have gathered 340 scan reports for the Browser Distribution Services, Inc. files. 21 of these scan results came up with some sort of detection. You can review the full details of the scan reports by examining the files listed above.
The analysis has been done on certificates with the following serial numbers: