cgsecurity.org

There is a file which can't be opened the Acrobat, writes, that can't open the file because it or wrong format or is damaged? When viewing on F3, it is visible that the file heading "is broken". Do not tell me how to cure a document?

So at you it will hardly turn out. "Headline" PDF can be considered except that the first 14 bytes.
The first line -- the signature of PDF and version number, the second indicates that the file contains binary data ( 4 bytes with ascii codes above 128).
The most important information is stored at the end of the file, before %EOF: address table cross-referencing and before this trailer, which contains the table size and number of root object (catalog) in the document structure. And the address of the previous cross-reference tables, if the file contains several.
see if the following article would help:
https://social.msdn.microsoft.com/Forum ... icegeneral