UNICODE bidirectional text characters

Question

need to work with malware which uses bidi strings. They not so widely documented and I've found part of them in one place, part in another. For now I have these:

 1. LRM - 0x200E
 2. RLM - 0x200F
 3. LRE - 0x202A
 4. RLE - 0x202B
 5. PDF - 0x202C
 6. LRO - 0x202D
 7. RLO - 0x202E

I want to ask if it is all UNICODE special characters, or I missed something.

Answer 1

Yes, they are Unicode characters related to directionality. They are used to control writing direction; they are invisible control characters, i.e. they are not displayed graphically, but they may affect the way printable characters are presented (left-to-right vs. right-to-left writing direction). Their effects are normatively defined in Unicode Standard Annex #9, Unicode Bidirectional Algorithm.

Generally, to find information about specific characters by their Unicode number (code point), Unicode Character Search at Fileformat.info is a good starting point.