Did you just run into a file that has a digital signature from SAP AG? If so, please read on.
You will typically notice SAP AG 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 digital signature details for SAP AG with the following procedure:
Here's a screenshot of a file signed by SAP AG:

As you can see in the screenshot above, the Windows OS reports that "This digital signature is OK". This implies that the file has been published by SAP AG and that the file has not been tampered with.
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, and so on. You can also see the address for SAP AG, such as the street name, city and country.
VeriSign Class 3 Code Signing 2004 CA, VeriSign Class 3 Code Signing 2010 CA and VeriSign Class 3 Code Signing 2001 CA has issued the SAP AG certificates. You can also see the details of the issuer by clicking the View Certificate button shown in the screengrab above.
These are the SAP AG files I've collected, thanks to the FreeFixer users.
| Detection Ratio | File Name |
|---|---|
| 0/41 | nwsapautoworkstationupdateservice.exe |
| 0/50 | NwCheckWorkstation.exe |
| 0/54 | NwSapSetupUserNotificationTool.exe |
| 0/53 | playerIE.dll |
| 0/54 | NwSapAutoWorkstationUpdateService.exe |
The detection percentage is based on the fact that I've collected 252 scan reports for the SAP AG files. 0 of these scan reports came up with some sort of detection. You can view the full details of the scan results by examining the files listed above.
The analysis has been done on certificates with the following serial numbers: