PDF_JBIG2_HEADER_TRUNCATED — JBIG2 segment-header walk aborted

medium PDF_JBIG2_HEADER_TRUNCATED

What it means

A JBIG2 image segment header could not be parsed cleanly (e.g. a length field points past the end of the data) — a renderer-divergence shape.

Why it fires

A JBIG2 segment header could not be parsed cleanly: a length field claimed more bytes than the stream contains, a referred-to-segment count was truncated, or a reserved code was used. Renderers that fail open on broken headers parse different segment data than renderers that abort.

Other PDF heuristics

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