It has been more than a year since I went on that account, I just realized that I can't remember the pdf password.
There are plenty of program aval. on internet, just search for the word in Google. NitroPDF is also good one as suggested by shabbir
I had seen a sofeware was posted on other web site which is named pdf password unlocker 3.0,i think which can help you out of your trouble
All the person in the same ip looking for PDF is not that good buddy. All account banned. happykaka, I warned you as well to stop promoting your PDS Software