The 20-character random string ( Hj374t3Tw3ukvL83DPP5 ) is a "hash" or a unique identifier. This is common practice for:

If you are certain the file is legitimate, follow these steps to manage it:

On Windows, right-click and select Extract All . On macOS, double-click the file. If it asks for a password, you will need the specific key provided by the sender or service.