Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ff3d079b9f13496…

MALICIOUS

PDF

36.0 KB Authoring application: Pdftk
MD5: 31589da08d07a1fdd5219e181c32d018 SHA-1: 1f99145526dd455c875b6e5d612521a20b202f25 SHA-256: 0ff3d079b9f134969aa8a78cafccc0abcdeb30fde37354929f1524e91c8111f0
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links to external websites, a technique often used for SEO manipulation or to host malicious payloads. ClamAV detected this file as 'Pdf.Phishing.TtraffRobotInstall-7605656-0', and a machine learning classifier also flagged it as malicious with high confidence. The document body contains garbled text related to pneumonia, which appears to be a lure.

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://marykrausconsulting.com/uploads/1/3/0/6/130620762/rasufisamiji.pdf
    • http://spencerbarnor.com/uploads/1/3/0/7/130775936/zozenosalowoxat_kenujupudor_zawud_rizubobarepet.pdf
    • http://crazyblendz.com/uploads/1/3/0/5/130551981/196682.pdf
    • http://djspryte.com/uploads/1/3/0/7/130776060/salumeborivug.pdf
    • http://michaelpachelo.com/uploads/1/3/0/7/130739690/58893c.pdf
    • http://iatbs.org/uploads/1/3/0/6/130620556/dedisibuwom.pdf
    • http://shanadruckerman.com/uploads/1/3/0/6/130605292/tetif.pdf
    • http://nabcepexamstudyguide.com/uploads/1/3/0/6/130605254/koxokabigod_kazilisegoligeg.pdf
    • http://lanceslaton.com/uploads/1/3/0/4/130483864/7679351.pdf
    • http://writeredit.com/uploads/1/3/0/6/130604907/4413177.pdf
    • http://mydrwalker.com/uploads/1/3/0/6/130621720/4861904.pdf
    • http://wellnessonedropatatime.com/uploads/1/3/0/8/130874025/fokurinula-vodolewixedegim.pdf
    • http://webmail.themodestshoptx.com/uploads/1/3/0/7/130738716/130738716.html#pneumonia+cause+pulmonary+edema

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000035d9.bin
eb0ffdea2b8af583b9656c18fff3a5ee105530c9620215f25db070c0867a1f2b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x35D9 7476 bytes

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