When I installed the package cups-pdf (cups-pdf_2.5.0-16_i386.deb) using apt-get the new printer was installed automatically. The printer queue has the name PDF.
If you need a ppd file you can search the list of files included in the cups-pdf package. Open an LXTerminal and issue
Code:
dpkg -L cups-pdf | grep ppd
If the printer was installed properly then you should find the printer "Generic CUPS-PDF Printer (en)" in the "Generic" section.