Did you just run into a file that has a digital signature from Konstantin Bredyuk? If that's the case, please read on.
You'll probably see Konstantin Bredyuk 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 Konstantin Bredyuk certificate with the following steps:
Here is a screencap of a file that has been signed by Konstantin Bredyuk:

As you can see in the screenshot above, Windows states that "This digital signature is OK". This means that the file has been published by Konstantin Bredyuk 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 examine the address for Konstantin Bredyuk, such as the street name, city and country.
COMODO RSA Code Signing CA has issued the Konstantin Bredyuk certificates. You can also view the details of the issuer by clicking the View Certificate button shown in the screenshot above.
These are the Konstantin Bredyuk files I have gathered, thanks to the FreeFixer users.Unfortunately I don't have any scan result from VirusTotal available for the Konstantin Bredyuk files at the moment. The scan results will appear here as soon as a FreeFixer user uploads a file digitally signed by Konstantin Bredyuk.
| Detection Ratio | File Name |
|---|---|
| Not available | TaskCrackerForOutlook.exe |
The analysis is done on certificates with the following serial numbers: