Did you just download a file that has a digital signature from Xi'an Dianyi Info Tech Co.,Ltd. and wonder if the file is safe? If that's the case, please read on.
You will probably see Xi'an Dianyi Info Tech Co.,Ltd. when clicking to run the file. The publisher name is then displayed as the "Verified publisher" in the UAC dialog as the screenshot shows:

You can view additional details from the Xi'an Dianyi Info Tech Co.,Ltd. certificate with the following procedure:
Here's a screenshot of a file signed by Xi'an Dianyi Info Tech Co.,Ltd.:

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 Xi'an Dianyi Info Tech Co.,Ltd. and that no one has tampered with the file.
If you click the View Certificate button shown in the screenshot 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, etc. You can also see the address for Xi'an Dianyi Info Tech Co.,Ltd., such as the street name, city and country.
VeriSign Class 3 Code Signing 2010 CA has issued the Xi'an Dianyi Info Tech Co.,Ltd. certificates. You can also examine the details of the issuer by clicking the View Certificate button shown in the screenshot above.
These are the Xi'an Dianyi Info Tech Co.,Ltd. files I've gathered, thanks to the FreeFixer users.
| Detection Ratio | File Name |
|---|---|
| 2/50 | mediadev.exe |
| 1/51 | webdev.exe |
| 0/50 | mediadev.exe |
| 0/50 | mediadev.exe |
| 0/51 | feedback.exe |
| 0/49 | webdev.exe |
Here is the detection names for the Xi'an Dianyi Info Tech Co.,Ltd. files. I have grouped the detection names by each scanner engine. Thanks to VirusTotal for the scan results.
| Scanner | Detection Names |
|---|---|
| DrWeb | Adware.Conduit.47 |
| ESET-NOD32 | a variant of Win32/SquareNet.A |
| Malwarebytes | PUP.Optional.UpdateService.A |
The detection percentage is based on that I've gathered 301 scan results for the Xi'an Dianyi Info Tech Co.,Ltd. files. 3 of these scan results came up with some sort of detection. You can view 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: