Malicious PDF — malware analysis report

Static analysis result for SHA-256 9de79f30557ee965…

MALICIOUS

PDF

32.6 KB Authoring application: Adobe PDF Library 9.0
MD5: 0388f01eeac117877d2b8e6805a8da9a SHA-1: 5ce8877b2364b71d6aa35f28dbc91d564332e6fa SHA-256: 9de79f30557ee96508de9e6b4edac13567861c404ea914eeb693e9880332037a
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to suspicious domains. ClamAV detection as 'Pdf.Phishing.TtraffRobotInstall-7605656-0' and the ML classifier's high confidence score further indicate malicious intent. The embedded URLs suggest a phishing or malware distribution campaign, aiming to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 3

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.TtraffRobotInstall-7605656-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.TtraffRobotInstall-7605656-0
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://fubiku.kuhni-msc15.icu/uploads/2020/01/27/1882696.pdf
    • http://wigapal.magaz-online18.ru/uploads/2020/01/28/5fa237.pdf
    • https://lezuwosiwori.weebly.com/uploads/1/3/0/6/130603922/96e7e0ea.pdf
    • http://popeantichrist.com/uploads/1/3/0/2/130289799/7b64d63b.pdf
    • http://kyleewald.com/uploads/1/3/0/5/130590653/6160810.pdf
    • http://dolitenas.tikko.ru/uploads/2020/01/28/c3455f9.pdf
    • http://maimanistation.com/uploads/1/3/0/6/130604276/130604276.html#teaching+english+for+young+learners+book+pdf

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001101.bin
b91bbb714fc003abf71944e3ae94aa72249a98989a8b0e00a302ffbc1a03f4c6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1101 8760 bytes
font_01_sfnt_off00004403.bin
41d5c9cb4d60b7530e3cfd93a78efd430fe179aa57a8296e74fb8a971da4b0ee		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4403 2600 bytes

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