Malicious PDF — malware analysis report

Static analysis result for SHA-256 a160d145aae3b03e…

MALICIOUS

PDF

37.0 KB Authoring application: Nitro PDF
MD5: ed9eec4a7db11eae9b22ab88ac539a0b SHA-1: c87afe397b8d69c7aaeb5dbdcb896d3ea9bdee5f SHA-256: a160d145aae3b03e5444077317334fee420773af364354ac11793452f9dd2430
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a large number of embedded links to external PDF files hosted on various domains, a technique commonly used for SEO poisoning or phishing. The heuristic 'PDF_SEO_LINK_FARM' and the ClamAV detection 'Pdf.Phishing.TtraffRobotInstall-7605656-0' strongly indicate a malicious intent to redirect users. No scripts were extracted from this sample, but the extensive link farm suggests a delivery mechanism for further malicious content.

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://prettypuffy.com/uploads/1/3/0/7/130776693/b701b.pdf
    • http://www.kaplanshack.com/uploads/1/3/0/8/130874260/nejifewudazin.pdf
    • http://biscuiteering.com/uploads/1/3/0/5/130539718/rakejimu_gimajaxab_gisinufikimolon.pdf
    • http://arsfabricandi.com/uploads/1/3/0/6/130603834/zuwuwowotejedat.pdf
    • http://www.phenomchild.com/uploads/1/3/0/2/130270987/supigun_totiv.pdf
    • http://moonshinemanorweddings.com/uploads/1/3/0/5/130589310/080c77d.pdf
    • http://paradigmcreativeworks.com/uploads/1/3/0/7/130776142/mopudizal.pdf
    • http://www.smudgeco.com.au/uploads/1/3/0/7/130776322/6477125.pdf
    • http://sedberghanddistrictbeekeepers.co.uk/uploads/1/3/0/9/130969338/sanuvajuf-vimeforimiredix-wogim-ruliw.pdf
    • http://san69.com/uploads/1/3/0/6/130639146/gegagumurobigijejo.pdf
    • http://eterpath.com/uploads/1/3/0/2/130289340/nomezajuvos.pdf
    • http://nomadicpeople.org/uploads/1/3/0/6/130603767/629046.pdf
    • http://youandyournewborn.com/uploads/1/3/0/2/130291649/soxizad-zogafegidi-vusunavipobove.pdf
    • http://chunkeymonkey40.com/uploads/1/3/0/6/130604340/rivurubudolemaluma.pdf
    • http://74-123-77-55.mgwnet.com/uploads/1/3/0/4/130476340/130476340.html#what+is+the+difference+between+jaw+crusher+and+cone+crusher

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000037e0.bin
796dc4a363569198175de2b8a18af3256d215e1f69731ab8cd67d32f7ec0cd1f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x37E0 7548 bytes

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