If you are sharing this file and want to make it look professional or helpful, you should replace the random string with context. Here are three ways to frame it:

: If you are unsure, open the file in a browser-based PDF viewer (like Google Drive preview) rather than downloading it directly to your hard drive.

: Copy the download URL and paste it into VirusTotal to see if the hosting site or file is flagged by security vendors.

: Only download if you specifically requested this file or trust the person who sent the link.