Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ff6841b95312997…

MALICIOUS

PDF

35.4 KB Authoring application: GIMP
MD5: acb3681ff4e9f4d4ed7a137cf761a166 SHA-1: e562e88fb75841b4ae74713146c05f6cc5d68188 SHA-256: 9ff6841b95312997674874ec2fe7e911020a1e981e0585a7d7c8ed468e26b2e1
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file was flagged by multiple heuristics, including a critical alert for a link farm and ClamAV detection as 'Pdf.Phishing.TtraffRobotInstall-7605656-0'. The embedded URLs point to a large number of external PDF files, suggesting a tactic to distribute malicious content or phishing lures. The ML classifier also strongly indicated maliciousness. No scripts were extracted, and the document body contained mostly garbage data, making the link farm the primary indicator of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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://30wallst.com/uploads/1/3/0/8/130813416/7258523.pdf
    • http://solitudeandsilence.org/uploads/1/3/0/6/130604626/menoxu-kotini-kusabevikerexan-fiwuwenero.pdf
    • http://www.keiokatsale.com/uploads/1/3/0/7/130776268/nuxajefonegalepumik.pdf
    • http://conscience-ai.com/uploads/1/3/0/8/130814586/9ac189460fa.pdf
    • http://abesoutfitters.com/uploads/1/3/0/5/130539059/xujada.pdf
    • http://renai-manual.com/uploads/1/3/0/7/130740512/54c52b6d6aaa6.pdf
    • http://www.thornconstruction.org.uk/uploads/1/3/0/6/130639876/retotewadoxata.pdf
    • http://infinitumnihilmedia.net/uploads/1/3/0/7/130739828/ee301e.pdf
    • http://mnhomeinteriors.com/uploads/1/3/0/2/130289735/8406790.pdf
    • http://amateurthongs.com/uploads/1/3/0/7/130739022/40cf5.pdf
    • http://naturallysport.net/uploads/1/3/0/5/130550925/webigajoxodonoz-sedewome-soxur-mikan.pdf
    • http://lyjro.co.uk/uploads/1/3/0/5/130546244/b50fac86.pdf
    • http://howtogaragestorage.com/uploads/1/3/0/6/130620454/gefojogak.pdf
    • http://amommachoosingjoy.com/uploads/1/3/0/4/130435561/43958226296.pdf
    • http://sta-66-99-58-198.ladse.org/uploads/1/3/0/5/130551210/130551210.html#natural+treatment+for+canine+addison%27s+disease

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002f66.bin
3e32a6fb781f1621f80d4e085a5a3fea75ae18f8013a1de5a043089ae875a2b9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2F66 8208 bytes

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