Confirmed it's on macOS 13.2.1.
It's exactly the same file as bitcoin.pdf (same content and same metadata), just renamed to simpledoc.pdf
Have you checked the hash of the file?
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It's the same file:
shasum bitcoin.pdf simpledoc.pdf 8de2fdb04edce612738eb51e14ecc426381f8ed8 bitcoin.pdf 8de2fdb04edce612738eb51e14ecc426381f8ed8 simpledoc.pdf
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