I have made some modifications to pdf-renamer to suit my personal needs. I have introduced a new format called {pylit}: LastNameYY.pdf. In addition to renaming the papers, the program now generates a bibtex.bib file that contains unique entries for the bibliographic information of the papers.
Installation:
python setup.py install
Usage:
for item in *.pdf; do; pdfrenamer -f {pylit} item; done
More about pdf-renamer and pdf2bib libs.