Convert CATDRAWING to PDF

You can export CAD design drawings as PDF/3D PDF documents, so some kind catdrawing to pdf conversion or export should certainly be doable. However, this will only make basically a picture that is good for sharing and publishing, but it also means it will not be useable as CAD file anymore. There should be a dedicated PDF function in CATIA and you can also achieve the same using some dedicated CAD conversion and format translation software.