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CHALLENGE05/ 06

FORENSICS // INTERMEDIATE

Burnt Receipt

Find what was hidden beyond a valid PNG’s end.

STATUSREADYIntermediate

CHALLENGE BRIEF

Brief

A one-pixel receipt preview renders normally, but its file is larger than the PNG structure accounts for. Locate and unpack the trailing evidence.

Objective

Find the end of the IEND chunk, identify the appended stream, and recover its note.

Container
valid PNG + trailing bytes
Clue
IEND is not EOF
Tooling
browser inspector included

INTERACTIVE LAB

Run the lab

YOUR NEXT MOVE
burnt-receipt.pngPNG
Download original

The preview renders. The byte count still looks wrong.

OPTIONAL HINTS

Hints

No hints opened. Hints do not affect progress.

    FINAL ANSWER

    ONE LAST STEP

    SUBMIT YOUR FLAG.

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