The keyword you provided, refers to a specific file identifier commonly associated with adult content distributed via the Japanese "FC2" platform and archived in a multi-part compressed format (RAR).
: It is common for these files to be locked with a password that requires the user to complete a survey or download a secondary "codec" (which is usually a virus) to unlock. Better Alternatives FC2-PPV-1855975-2.part1.rar UPD