ogg to pdf conversion is possible in the sense of inserting playable .ogg audio file inside PDF document, which is something that can be done with pretty much any PDF editor.
It might be possible to achieve the same if you prepare a new document in Word for example and embed the .ogg file as audio content, then you have to properly export the PDF file so the playable content is preserved.
In more broad sense such conversion might also be used as a way to produce music sheets (exported as PDF files) from OGG audio content. But that requires a tool that can generate music sheet from audio files, something like Harmony Assistant or MuseScore.
Updated: September 28, 2023