Malicious PDF — malware analysis report

Static analysis result for SHA-256 21a6c0486cd110d5…

MALICIOUS

PDF

41.9 KB Authoring application: pstoedit
MD5: abacc545db2045bf8c7122dbceb43993 SHA-1: dc0a99ea74a676a0195f877721505a74b2c6775f SHA-256: 21a6c0486cd110d56ca4e77869e6270105435d97e5b1de68926fe3f8447a5c73
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded links to external PDF files, as detected by the PDF_SEO_LINK_FARM heuristic. This indicates a likely attempt to manipulate search engine results or distribute malicious content through a link farm. The ClamAV detection and ML classifier further support its malicious nature, classifying it as Pdf.Phishing.TtraffRobotInstall. The document body content is heavily obfuscated and does not provide clear intent beyond the heuristic findings.

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://proletas.com/uploads/1/3/0/3/130379121/3405648.pdf
    • http://pitchstock.net/uploads/1/3/0/6/130604002/8f6496cbbde1.pdf
    • http://nvintl.com/uploads/1/3/0/5/130588277/rukadodezusejen.pdf
    • http://awereadykids.com/uploads/1/3/0/4/130436209/bcf6979d55.pdf
    • http://www.oxnard-photography.com/uploads/1/3/0/5/130551898/mimuzav_muvor_xuzari_vorubejarat.pdf
    • http://julycreations.com/uploads/1/3/0/9/130969777/jiromad-jepitelafa-fedebu-garisoko.pdf
    • http://gloriashen.com/uploads/1/3/0/7/130740504/widezabimipe.pdf
    • http://saysomegood.com/uploads/1/3/0/5/130589040/lonufadiwuro.pdf
    • http://autodiscover.ldavismunro.com/uploads/1/3/0/3/130323266/c2d8895daf5.pdf
    • http://phadeologist.com/uploads/1/3/0/5/130540208/jizuseres.pdf
    • http://lorisingleton.com/uploads/1/3/0/2/130270904/majobufe.pdf
    • http://leadreads.com/uploads/1/3/0/6/130639990/673876.pdf
    • http://constructionbondusa.com/uploads/1/3/0/5/130588191/5487239.pdf
    • http://coreducate.com/uploads/1/3/0/6/130639552/rixumigumumepesot.pdf
    • http://thereluctanttransformationalist.com/uploads/1/3/0/3/130379287/bekeged-mulurerute-gujunizuved-zujopulubukiv.pdf
    • http://www.youngspencil.com/uploads/1/3/0/6/130621542/lapufom-lejelimis-sukidoxozugebuk.pdf
    • http://monstacartoons.com/uploads/1/3/0/7/130776257/0f9d94b5.pdf
    • http://edukationcanada.com/uploads/1/3/0/3/130313641/107f2d36723.pdf
    • http://mpassociatesrealtors.com/uploads/1/3/0/6/130605159/temetofogelevo.pdf
    • http://clutchadministration.com/uploads/1/3/0/5/130539279/d916ca.pdf
    • http://london-office-7.pleasingfood.com/uploads/1/3/0/7/130776754/130776754.html#new+cheat+codes+for+gta+vice+city+pc
    • http://lorising

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004322.bin
739ab13f46201534b707f529134ce963d32d5664c6a7a2e4b462f68547e8bd73		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4322 8336 bytes

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