Creators often share "teasers" or blurred versions of their content on Twitter (X) or Instagram, where the source link might contain the file ID.
When a creator uploads a photo, the platform renames it to a random string like this to prevent "scraping" (automated downloading) and to ensure every file has a unique name in their database.
Users who subscribe to creators often see these file names in their browser history or download managers.
If you encountered this filename online, it was likely in one of the following contexts: