Did you just run into a download or a file on your computer that is digitally signed by Shanghai Holdfast Online Information Technology Co. Ltd.? If that's the case, please read on.
You'll typically see Shanghai Holdfast Online Information Technology Co. Ltd. when double-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 the additional details from the Shanghai Holdfast Online Information Technology Co. Ltd. digital signature with the following steps:
Here is a screenshot of a file that has been digitally signed by Shanghai Holdfast Online Information Technology Co. Ltd.:

As you can see in the screencap above, the Windows OS states that "This digital signature is OK". This means that the file has been published by Shanghai Holdfast Online Information Technology 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 see 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 examine the address for Shanghai Holdfast Online Information Technology Co. Ltd., such as the street name, city and country.
VeriSign Class 3 Code Signing 2009-2 CA has issued the Shanghai Holdfast Online Information Technology 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 Shanghai Holdfast Online Information Technology Co. Ltd. files I've gathered, thanks to the FreeFixer users.
| Detection Ratio | File Name |
|---|---|
| 0/46 | longradrvx86.sys |
The detection percentage is based on that I have collected 46 scan results for the Shanghai Holdfast Online Information Technology Co. Ltd. files. 0 of these scan reports came up with some sort of detection. If you like, you can view the full details of the scan reports by examining the files listed above.
The analysis is based on certificates with the following serial numbers: