"first they ignore you, then they threaten to sue you, then they deny the vulnerability, then you p0wn them" -- with apologies to Mahatma Gandhi 
bruma:~ arrigo$ file pocorgtfo02.pdf 
pocorgtfo02.pdf: x86 boot sector
and 
bruma:~arrigo$ unzip -v pocorgtfo02.pdf 
Archive:  pocorgtfo02.pdf
warning [pocorgtfo02.pdf]:  8016414 extra bytes at beginning or within zipfile
  (attempting to process anyway)
 Length   Method    Size  Cmpr    Date    Time   CRC-32   Name
--------  ------  ------- ---- ---------- ----- --------  ----
     852  Defl:X      487  43% 12-06-2013 15:25 0fc440e1  README.txt
    6794  Defl:X     3480  49% 12-06-2013 15:25 4b385f76  coda.txt
   20164  Defl:X     8528  58% 12-06-2013 15:25 962bd958  feeling.txt
   12618  Defl:X     5474  57% 12-06-2013 15:25 fcda0efb  harrison.txt
       0  Stored        0   0% 12-06-2013 15:25 00000000  pgpquine/
     275  Defl:X      157  43% 12-06-2013 15:25 2790c077  pgpquine/Makefile
    1006  Defl:X      451  55% 12-06-2013 15:25 674094dc  pgpquine/inflate.c
    5323  Defl:X     1336  75% 12-06-2013 15:25 37ca5711  pgpquine/quine.c
  203706  Defl:X    56538  72% 12-06-2013 15:25 79ba361f  rfc4880.txt
 2046109  Defl:X  2008069   2% 12-06-2013 15:25 95b8c390  tamagotchi.zip
   15565  Defl:X     6602  58% 12-06-2013 15:25 cf9bdba0  thewub.txt
  278598  Defl:X   276364   1% 08-05-2013 11:06 cd0ed2ff  pocorgtfo00.pdf
 3790438  Defl:X  3723466   2% 10-13-2013 00:47 c9220017  pocorgtfo01.pdf
--------          -------  ---                            -------
 6381448          6090952   5%                            13 files
If the above looks amazing, and in it is in many ways, then you should read the other work by Ange Albertini, mix and his binary polyglots.