Hi,

Perhaps it could help you.
Vector graphic software like Inkscape, is able to digitalize bitmap pictures.
So, you can
- import your pdf file in Inkscape
- you have to ungroup your object (because Inkscape see in a pdf a group)
- select the picture
- use the function Path/vectorize bitmap
- use a single path option and validate
- you have now a bitmap and a vector object.
- delete the bitmap
- save your file as SVG file or pdf (this pdf will be a vector pdf)

Moi can import SVG files or pdf vector files.

Test it. It could be part of your need.

Or this other free one when you have an Imge of your PDF...
https://www.autotracer.org/fr.html

The best is to redraw with a CAD application or with Moi3D using bitmap image from PDF as a reference.

;)
https://moiscript.weebly.com/vectorisation.html

You have also the Hight Map inside Moi by Max for make volumes from images grey scale..
https://moiscript.weebly.com/heightmap.html