Did you just run into a download or a file on your computer that has been digitally signed by PushBullet Inc? If that's the case, please read on.
You will typically see PushBullet Inc when running the file. The publisher name is displayed as the "Verified publisher" in the UAC dialog as the screencap shows:

You can view additional details from the PushBullet Inc certificate with the following procedure:
Here is a screenshot of a file that has been digitally signed by PushBullet 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 PushBullet Inc 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 view the address for PushBullet Inc, such as the street name, city and country.
Sectigo RSA Code Signing CA has issued the PushBullet Inc certificates. You can also see the details of the issuer by clicking the View Certificate button shown in the screenshot above.
The following are the PushBullet Inc files I've collected, thanks to the FreeFixer users.
| Detection Ratio | File Name |
|---|---|
| 0/70 | pushbullet_client.exe |
The detection percentage is based on the fact that I have collected 70 scan results for the PushBullet Inc 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 results by examining the files listed above.
The analysis is done on certificates with the following serial numbers: