Read Japanese characters in a PDF file

Question

I have the following command:

[<0e0f0a52030d030e0ce5030f0744030f>10<030d>10<0cd4>]TJ

I know that it hides Japanese in the Hex secti

Answer 1

Here is your problem:

I figured out that there is an extra "encryption", Identity-H, and I've read here that you need a /ToUnicode map which I cannot seem to find in the file.

That indicates the two-byte hex codes in your text strings are immediate glyph indexes into the original font file. Search the font file for a Unicode character map (one of its cmap entries); this will provide the link from glyph index to Unicode.

Note that it's possible that a glyph index does not translate immediately to a Unicode codepoint. A GSUB or GPOS OpenType table may have taken one or more Unicode characters as input and substituted them with another glyph in the output string. It's also possible (but less likely) the original creator inserted raw glyphs manually.