Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c43a287ef64a59f…

MALICIOUS

PDF

117.0 KB Authoring application: PDF Studio
MD5: 12ca1b3c5a8dfc0b58f1949482bd87c6 SHA-1: 51dc0fa23722f525b4bdd3df6c26e19c8514965d SHA-256: 5c43a287ef64a59f68396cf9a0d44605175aa1a68bacb3362b0b28a95ef80541
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a large number of embedded external links, as indicated by the PDF_SEO_LINK_FARM heuristic. The ClamAV detection and ML classifier also flagged this file as malicious, specifically as Pdf.Phishing.TtraffRobotInstall. The embedded URLs likely serve to redirect users to malicious content or facilitate SEO manipulation. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://vintagehomecharleston.com/uploads/1/3/0/5/130550750/8435151.pdf
    • http://www.imculleneans.com/uploads/1/3/0/3/130312913/kiwowepufuko_nuliduzobixu_buzolala.pdf
    • http://www.mysunshineonline.com/uploads/1/3/0/7/130776553/nupozev_ravum.pdf
    • http://3x1-jeans.com/uploads/1/3/0/7/130775180/1223967.pdf
    • http://littke.org/uploads/1/3/0/6/130639407/rowiwas.pdf
    • http://umutsulun.com/uploads/1/3/0/2/130271058/2913674.pdf
    • http://goodforshryne.com/uploads/1/3/0/6/130621691/vugajagaxuk-wagused.pdf
    • http://shrinksync.com/uploads/1/3/0/7/130775740/2289f3d18bcdb.pdf
    • http://isaakpeters.com/uploads/1/3/0/8/130815192/86bad.pdf
    • http://bleached.net/uploads/1/3/0/2/130287246/vakafegotuzu.pdf
    • http://perkins-portfolio.com/uploads/1/3/0/4/130489090/fibaximowipimifoku.pdf
    • http://www.thelastminutecelebrant.com.au/uploads/1/3/0/5/130588656/beluvug.pdf
    • http://www.sunshinecoastentertainment.com/uploads/1/3/0/6/130622095/4649585.pdf
    • http://normexconsultores.com/uploads/1/3/0/4/130489536/nakivofojazazapodo.pdf
    • http://shelleyortner.com/uploads/1/3/0/2/130273617/fokok.pdf
    • http://74-123-77-52.mgwnet.com/uploads/1/3/0/5/130538996/130538996.html#state+and+explain+the+first+law+of+thermodynamics+in+chemistry
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://fedoraproject.org/wiki/Licensing/LiberationFontLicense

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003181.bin
4d1a66be287b8ef1c7a139d510c65ccbec1d107d322590b3ed77d0cbd45b96a9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3181 10972 bytes
font_01_sfnt_off0000fed0.bin
80398047ebfd0214373c8587c95fe06d458f29cd0615fa929aaa6778bac8f564		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFED0 3824 bytes

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