Type 1 CharString operand stack grows beyond spec

PDF_TYPE1_CHARSTRING_STACK_OVERFLOW

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high PDF_TYPE1_CHARSTRING_STACK_OVERFLOW

What it means

Decrypted Type 1 CharString bytecode pushes more operands than expected.

Why it fires

Type 1 CharStrings are stack bytecode. Operand-stack overflow is a font-engine exploit primitive.

Other PDF heuristics

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