: A "paper" script or external .srt file to accompany the video.
: Printable "paper" covers or labels used if you are burning the file to a physical Blu-ray or DVD.
Since this specific filename is commonly associated with peer-to-peer file sharing, the "paperwork" (NFO) usually lists: : H.264 / AVC codec at 1920x1080 resolution. Audio : Likely Russian AC3 or DTS 5.1 surround sound. Source : A retail Blu-ray disc.
If you are looking for "paper" related to this specific file, you are likely looking for one of the following: