Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc36316deb74b775…

MALICIOUS

PDF

30.7 KB Authoring application: Mobipocket Creator
MD5: fb05e7fde185cfb96dd710a51db2bd4d SHA-1: 2dc910e5204b5c3a2b5478814b0a98fd7ac530c1 SHA-256: bc36316deb74b775b5e257546a7a4065034efc1bb6b70251dcbc84b94fabbd72
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs pointing to other PDF files, a technique often used for SEO manipulation or to distribute malicious content. The ClamAV detection 'Pdf.Phishing.TtraffRobotInstall-7605656-0' and the ML classifier output strongly indicate malicious intent. No scripts were extracted, and the document body was unreadable, but the heuristic firings and extensive URL list are sufficient for a high-confidence assessment.

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://riverstreetmews.com/uploads/1/3/0/7/130776276/25d4f54.pdf
    • http://petsaver.net/uploads/1/3/0/4/130435811/wosudaxakulupanox.pdf
    • http://skintabulous.com/uploads/1/3/0/6/130604105/lifajuvufotuvix.pdf
    • http://hashtagz.org/uploads/1/3/0/5/130588964/2865020.pdf
    • http://kateramlee.com/uploads/1/3/0/4/130435785/vebibofidesuwalajak.pdf
    • http://www.brixhamcollege.com/uploads/1/3/0/8/130874544/vugatezifin-vusidalobenasi-tijan.pdf
    • http://ravenhousevintage.co.uk/uploads/1/3/0/7/130775295/879f7ec.pdf
    • http://prairienanotech.net/uploads/1/3/0/4/130483578/23124.pdf
    • http://checksymptom.com/uploads/1/3/0/6/130604373/muzexikugef.pdf
    • http://whatsthematterwithhumans.com/uploads/1/3/0/4/130488688/6432029.pdf
    • http://rainescampaign.com/uploads/1/3/0/2/130289336/7739730c42fb3.pdf
    • http://mail.highbyte.com/uploads/1/3/0/7/130775320/semisix-xogutegu-ragofiro-zadubuwabos.pdf
    • http://365daysofkink.com/uploads/1/3/0/7/130739533/xaromepekufutiwer.pdf
    • http://lauriamusic.com/uploads/1/3/0/8/130813975/jonalagupuvogadij.pdf
    • http://rebeccalaplacaattia.com/uploads/1/3/0/3/130323219/130323219.html#factoring+quadratic+trinomials+worksheet+kuta

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001ddb.bin
1d54d01cd80cd902dd6491a5a82184db1d0caf390733503d6bcc6342d60e2803		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1DDB 7864 bytes

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