As with any compressed file from an unofficial source or older forum, you should scan it with updated antivirus software before opening it to ensure it hasn't been compromised.
Based on available information, appears to be a resource file associated with the Japanese rhythm game community, specifically for the event BOFoonXV - THE BMS OF FOON eXtreme Violence . What is inside the file? peypey.zip
The file is linked to a Be-Music Source (BMS) entry. In this context, a .zip file typically contains: As with any compressed file from an unofficial
: Often in .wav or .ogg format, these are the individual sounds triggered when you hit notes. peypey.zip