I am printing pdf file in firefox. This file is again converted to another pdf file and sent to spooler directory /var/spool/cups as printing job. When I try to read this spooled pdf file through our application, then we are not able to extract text from that pdf file. PDF file is displayed properly but when we copy text from it and try to paste it somewhere then text is not correct. For example if the text in original pdf file is "Block" then through spooled pdf file we get "L?:'&".