Malicious PDF — malware analysis report

Static analysis result for SHA-256 797b4a8222e2387f…

MALICIOUS

PDF

32.1 KB Authoring application: Mobipocket Creator
MD5: caf1818d715d36bacdd5772f19a6b2bb SHA-1: 086fff4ca6adfba40befcdba572914a9f211713e SHA-256: 797b4a8222e2387fa98cd1026ea7f653f087091a21c02a88b44ae4388359f64e
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics, including a critical PDF_SEO_LINK_FARM rule indicating a mass external link farm. The ML classifier and ClamAV also identified it as malicious, specifically as Pdf.Phishing.TtraffRobotInstall. The embedded URLs point to numerous PDF files hosted on unrelated domains, suggesting a campaign to manipulate search engine results or distribute further malicious content. No scripts were extracted from this sample.

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://codermonthly.com/uploads/1/3/0/7/130776741/zuxotofevamixu-bipepudi-felomidolan.pdf
    • http://stan.holyrood-drama.com/uploads/1/3/0/8/130874593/luwikorudogizalumi.pdf
    • http://stellarconcessions.com/uploads/1/3/0/5/130588513/zilexudoseresibat.pdf
    • http://jemstonefs.com/uploads/1/3/0/6/130604988/7478870.pdf
    • http://y4xtravel.com/uploads/1/3/0/5/130539697/02aa61ea626fa7.pdf
    • http://misobuildingptyltd.com/uploads/1/3/0/3/130323377/gakubajafo.pdf
    • http://heavenlyframes.com/uploads/1/3/0/5/130588214/9453788.pdf
    • http://mta-sts.mail.lukilukedesign.com/uploads/1/3/0/6/130621331/8644508.pdf
    • http://hostmaster.reneefotografeert.com/uploads/1/3/0/6/130639532/kaxidowo.pdf
    • http://noahcaseycounselling.com/uploads/1/3/0/6/130620847/914fbd4.pdf
    • http://foundationlevelinglott.com/uploads/1/3/0/5/130588928/9bdf75b531c3.pdf
    • http://opsmobilelearning.com/uploads/1/3/0/6/130620783/f5c639cb5260.pdf
    • http://www.twirlydresslady.com/uploads/1/3/0/5/130550714/pilijotuli_fujoj_gosozuxatim.pdf
    • http://www.lifereflectionsbykaren.com/uploads/1/3/0/9/130969594/a06b68.pdf
    • http://kosherfoshan.com/uploads/1/3/0/6/130639281/4263247.pdf
    • http://michaelshusko.com/uploads/1/3/0/7/130776366/130776366.html#merge+pdf+free+download+adobe

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000225d.bin
21e92eef7b711ed67cfb9d8093e6abe064b8876f65189baf968db8e4067ade32		 pdf-font-stream PDF embedded font (sfnt) at offset 0x225D 7712 bytes

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