Which magic byte indicates that an analyzed file is a pdf file?

The correct answer is C. 255044462d. The magic number (also known as a magic byte) is a sequence of bytes used to identify the format of a file. For PDF files, the standard magic number is: 25 50 44 46, which translates to %PDF in ASCII. Option C (255044462d) begins with 25 50 44 46, confirming it's a PDF file…

Submitted by the_admin· Mar 6, 2026Cloud Security Operations & Incident Response

Question

Options

AcGRmZmlsZQ
B706466666
C255044462d
D0a0ah4cg

How the community answered

(28 responses)

A
7% (2)
B
4% (1)
C
86% (24)
D
4% (1)

Explanation

The magic number (also known as a magic byte) is a sequence of bytes used to identify the format of a file. For PDF files, the standard magic number is: 25 50 44 46, which translates to %PDF in ASCII. Option C (255044462d) begins with 25 50 44 46, confirming it's a PDF file signature. This is a key forensic detail when performing file type identification and validation of potentially obfuscated or renamed files.

Topics

#File signatures#Magic bytes#PDF format#Forensics

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