Use exiftool to see if the creation dates or author names provide clues.
This is likely a write-up for a technical exercise where you analyze a ZIP file to find hidden flags or data. ledger-new.zip
Does this fit what you were looking for, or Use exiftool to see if the creation dates
It might be a brief overview of a new "ledger" application or script you are developing and distributing as a ZIP. ledger-new.zip