Importing a PDF-file is more or less the same as scanning a music sheet.Is it possible to import a PDF file into the program and then transpose it?
Conversion of graphics data to obtain music data is a complex task tha MusiCAD is not capable of.
However, It should be possible to use some other (external) tool to convert PDF to MIDI or XML which could in turn be imported and then transposed by MusiCAD, but the first steps are not that easy...