https://www.bleepingcomputer.com/news/security/discord-will-switch-to-temporary-file-links-to-block-malware-delivery/

Discord will switch to temporary CDN links for all users by the end of the year to block attackers from using its content delivery network for malware delivery.

"Discord is evolving its approach to attachment CDN URLs in order to create a safer and more secure experience for users. In particular, this will help our safety team restrict access to flagged content, and generally reduce the amount of malware distributed using our CDN," Discord told BleepingComputer.