Analysis of Methods for Hiding Information in PDF Documents and Opportunities for Their Progress

Notwithstanding the popularity of multimedia files for steganography purposes, other files, whether binary data files, executables or text based files, can also be used to hide information. The widespread use of PDF files can make its use for this purpose an interesting and practical solution. In the article, an analysis was made of the structures of PDF documents, the use of steganography capabilities and their detection. A study of steganography algorithms from open sources was conducted and based on the analysis, an algorithm for detecting steganography was proposed. For this purpose, an integrated approach was developed.