This is the official CD-ROM cover art for OpenBSD 2.8, as seen in https://www.openbsd.org/artwork.html. Unfortunately it doesn't seem like the OpenBSD website has the full resolution of this exact cover (there is a related one at https://www.openbsd.org/images/poster4.jpg but that one is a poster) so I'm assuming this got scanned by the uploader instead.

EDIT: Ah nevermind I found it lol: https://www.openbsd.org/images/openbsd28_cover.gif

EDIT2: Also found the CD illustrator to be Ty Semaka, the same guy who originally created the Puffy mascot for 2.5: https://marc.info/?l=openbsd-announce&m=97568429413966&w=2#:~:text=-%20THANKS%20-