Based on the structure of the name, it is likely one of the following:
Are you trying to of this specific file, or did you find it in a specific folder on your computer? XXSh.ed.e.saXX.zip
It could be a specific draft export from a creative tool or a backup from a private server where "Sh," "ed," and "sa" refer to specific project stages (e.g., Short, Edited, Sample). Based on the structure of the name, it