Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a4429495bacb8cf…

MALICIOUS

PDF

34.7 KB Authoring application: pdf-parser
MD5: 91436cdb352d2cd5e6cfab4228432350 SHA-1: a14490d2350cf0b30ad10b4f0cb09d4cc523271d SHA-256: 5a4429495bacb8cf2e5354f9c1a3f6db056aa1e62e2eb2ecde92dfd57f81d495
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains a large number of embedded links to external PDF documents hosted on various domains. The heuristic 'PDF_SEO_LINK_FARM' indicates a mass external link farm, suggesting the primary purpose is to manipulate search engine results or distribute malicious content. While no scripts were explicitly extracted, the nature of the embedded links and the ClamAV detection as 'Pdf.Phishing.TtraffRobotInstall' strongly suggest a phishing or malicious content distribution campaign.

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://reviewweiver.com/uploads/1/3/0/6/130639459/desemezimisimevozigo.pdf
    • http://nanaspizzapr.com/uploads/1/3/0/5/130589315/c38800.pdf
    • http://toscanainfortunistica.it/uploads/1/3/0/6/130639476/5bda6124e00.pdf
    • http://guiadosisu.org/uploads/1/3/0/2/130274145/e62d400e5da799.pdf
    • http://nikkimannion.com/uploads/1/3/0/7/130738753/2ec554.pdf
    • http://restroomlist.com/uploads/1/3/0/6/130621193/638bf968c7383.pdf
    • http://dmrackley.com/uploads/1/3/0/4/130476619/21be975ea.pdf
    • http://nonreligiousspiritual.com/uploads/1/3/0/3/130313613/9a975250.pdf
    • http://bitbreakers.com/uploads/1/3/0/2/130287866/kelebaros.pdf
    • http://sidtandkendrasaunders.com/uploads/1/3/0/4/130489727/33084014df5066.pdf
    • http://balboaislandrealtor.com/uploads/1/3/0/6/130604299/jogawimefewozu.pdf
    • http://travelindepth.com/uploads/1/3/0/5/130588772/walajurew-mupuj-nakadife.pdf
    • http://hostmaster.welshmountainwalks.co.uk/uploads/1/3/0/3/130313324/xamil.pdf
    • http://xinli88wangshangyule.br3h.com/uploads/1/3/0/4/130489926/130489926.html#passive+voice+advanced+worksheet+pdf

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002e7e.bin
76afde0a61535e6f3e49fdc8f6e739885b03a550c70d90c7fa61478caeb3f0fe		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2E7E 7880 bytes

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