I have a very large number of files (tens of thousands) who's binary all begins with 0x00 0x06. They do not open with 7-ZIP. I notice also that all Office files seem to share the same next 32 bytes.
A03D8B002E542C0DE10000C41EF0016000007FFF120030483E09F883AD3C0362
It is a very old format, so I cannot find a decompression program, and do not even know how to confirm that it is the indeed an old PKZIP format.
The compressed file is indeed compressed by about 50%.
On Linux, creating a fake file using
perl -e 'print "\x00\x06\xde\xad\xbe\xef";' > foo
and running file foo yields
foo: TTComp archive data
Then it's easy: http://fileformats.archiveteam.org/wiki/TTComp_archive which says that it used the early PKWARE "implode" algorithm
DCL Implode is not the same format as ZIP's old "implode" compression method (#6). It is unfortunate that there are two formats named "implode" associated with the same company. It can be used in ZIP, as compression method #10, but support for this is limited.
The terms "blast" and "explode" are sometimes used in association with this format.
There are decoders for it, for example this one written in Go.
I would first confirm the file format. Without the entire file this is difficult. Recommend you run the application through a signature based identification program to identify matches.
For example TridNet which detects over 12,000 different file types:
Based on the file bytes provided (which may not be sufficient to determine) expect file type is TTComp archive compressed (bin-4K).
If TTComp format, the first byte 0x0 indicates binary file; 0x06 indicates a 4096 byte dictionary which was the most common size dictionary for this file type. These files can be decompressed with TTDecomp
PK?