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saintjejemon, posted Mon Jun 27, 2022 10:52 pm (72333)

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Can anyone tell me how to work on extracting these files? It looks like it's using some sort of compression/encryption in it.

Here is some sort of pseudo-code for its file structure:

Code:

//(first 48-bytes)
> (first 16-bytes) nothing relevant
> (long) starting offset of a file in the archive
> (long) archive data size (starting from offset 48)
> (long) starting offset for archive table info >>>2
> (long) unknown
> (long) offset to EPHD/PPHD >>>3
> (long) EPHD/PPHD table info file size

//PPEF
>>>2 (48-bytes) irrelevant data
>>>3 PPHD magic word
> (longlong) unknown
> (longlong) unknown
> (long) offset to PPTN table (  ((long) starting offset of a file in the archive)   48))
> (long) offset to PPVA table (  ((long) starting offset of a file in the archive)   48))

//PPVA
> (long) PPVA magic word
> (longlong) unknown
> (longlong) unknown
> (long) file count ( 1)
> (longlong) unknown
//table starts here
> (long) file(1) offset (  48)
> (long) unknown
> (long) file(1) length
> (long) unknown

Here are some samples: https://drive.google.com/drive/folders/1aJB5v-TiZQif9ULP9kusxRbzP4UDVVCb?usp=sharing

Thanks in advance.