I found this from a hacking group on fb. Uses a dictionary to get the preset password. Doesn't specify an OS when I skimmed through it.
https://securityevil.blogspot.in/2018/01/cracking-pdf-password-using-dictionary.html?m=1
i think a repo needs to be added to install cupp its a sketchy site i d k about adding a repo.
sudo apt-get install cupp
Reading package lists... 0%
Reading package lists... Done
Building dependency tree
Reading state information... Done
E: Unable to locate package cupp