I haven't run https://top-fwz1.mail.ru/js/code.js myself but a quick glance at it seems to indicate that it tries to harvest data from the page (references to "gender", "age", etc) and some shady-named variables like "bait". Also a function that fetches data from top-fwz1.mail.ru and then tries to submit a hidden 1px*1px form created in an iframe using this data and who knows what else.
All other archive.ph links from the poster seem to contain the same JS code from mail.ru, which makes it either doubly suspicious, or just means their computer or network is infected with something that injects it into their pages, who knows.