Malicious PDF — malware analysis report

Static analysis result for SHA-256 dfd236be9484a3f6…

MALICIOUS

PDF

32.4 KB Authoring application: pdf-parser
MD5: 9e941ae23945dc9a92ce1c07656b92c2 SHA-1: 66c0570b84a708c0fdc0674c713e86049af6d65f SHA-256: dfd236be9484a3f64fee657fe300e715b816cff02db3b9367e1940db1f4bb67b
150 Risk Score

Malware Insights

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

The PDF document was flagged by multiple heuristics, including ClamAV and an ML classifier, as malicious. The 'PDF_SEO_LINK_FARM' heuristic specifically identified a large number of external PDF links, with the first being http://ottica2g.com/uploads/1/3/0/5/130588744/genazinerufu.pdf. This indicates a likely phishing or malware distribution attempt through a link farm strategy.

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://ottica2g.com/uploads/1/3/0/5/130588744/genazinerufu.pdf
    • http://ivyensemble.com/uploads/1/3/0/3/130323157/bumejoxadi-varutufitezaza-mexenagos-sopebew.pdf
    • http://insideosuokc.net/uploads/1/3/0/5/130588188/8420053.pdf
    • http://ketocoacher.com/uploads/1/3/0/7/130775395/1592772.pdf
    • http://3mtruedefinition.com/uploads/1/3/0/6/130603942/673b7ca5.pdf
    • http://thetalentsnetwork.org/uploads/1/3/0/3/130312996/2f5eff.pdf
    • http://cbcsomerset.com/uploads/1/3/0/4/130476505/8878460.pdf
    • http://synergymhs.com/uploads/1/3/0/2/130289311/5529317.pdf
    • http://agapanthus-plants.com/uploads/1/3/0/7/130775267/fulelojo.pdf
    • http://www.nsainapparel.com/uploads/1/3/0/7/130740178/lotutexa_ritiki_giloruxefawukug_sivebezifu.pdf
    • http://gippslandflights.com/uploads/1/3/0/7/130738939/pizozariwot.pdf
    • http://vps19.pleasingfood.com/uploads/1/3/0/6/130621294/130621294.html#reading+comprehension+practice+worksheets+for+2nd+grade

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000026dd.bin
840aa19d2f156d48b26f95cbd11f4e758c88290e19fc2d5ce7c4c3e54b091aa1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x26DD 8060 bytes

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