Does anyone know how to import PDF to CAD drawings?

I have scanned floor plans as PDFs and need them in a CAD drawing to trace over, but can’t figure out how to bring them in. Does it matter if they’re vector or just images?

Yes, it matters. A vector PDF can usually be imported as editable geometry with CAD’s PDF import command, while a scanned plan is just a raster image and needs to be attached as an underlay and traced. Scale it using one known dimension, then lock that layer before drawing over it. I learned the scaling part the hard way on a shop layout.