sudo find / | grep -e '.pdf^' >> pdfs.txt

IFS=$'n' count=0; # IFS for there are files with spaces in the filename
for line in $(cat pdfs.txt); # for each path
do
count=$((count + 1)); # updates the counter
echo $line $'n' > $count.txt;  # puts the file path in a file with the $count name
pdf-parser -f $line >> $count.txt;  # puts also the result of the analysis of this file
done # repeats