mkdir processed
for f in *.pdf; do
  filename=${f/.pdf}
  printf "## %s\n\n" "${filename//[-_]/ }" >> pdf_text.md

  pdftotext "${f}"
  cat "${f}.txt" >> pdf_text.md
  printf "\n\n" >> pdf_text.md

  mv -- ${f} "${filename}.txt" processed/
done