Conversion of pdf files to stl file format

You can likely use programs like the Babel3D, which can export a 3D CAD data saved inside a 3D PDF document and save it in one of the CAD/3D formats, including the STL format which is used for stereolithography - 3D printing.

Open PDF file    Open STL file

Related software

Babel3D

An online CAD conversion service

Online CAD converter

A commercial online CAD converter