Malicious PDF — malware analysis report

Static analysis result for SHA-256 a304fb4996bef17c…

MALICIOUS

PDF

44.5 KB Authoring application: PDF Studio
MD5: 6fdeefbfef8a9891824d648af33b411c SHA-1: 8e7050fd839311745a7a178b9a276e0622d93e06 SHA-256: a304fb4996bef17cf698ca2a3d5745591ce8a0e8ca73fd985853c8f1694b2bd5
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded URLs pointing to other PDF files hosted on various domains. This behavior is indicative of a link farm or a phishing campaign designed to distribute malicious content or manipulate search engine results. The ClamAV detection as 'Pdf.Phishing.TtraffRobotInstall-7605656-0' further supports the malicious intent. No scripts were extracted from this sample, and the document body text is largely unreadable binary data with some interspersed URLs.

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://milablooms.com/uploads/1/3/0/2/130271011/2458033.pdf
    • http://umotivemove.com/uploads/1/3/0/4/130436159/zawepajukawim-vawerizevutil-pirenarorufonol.pdf
    • http://grapheinsarl.net/uploads/1/3/0/5/130550826/1e7e05588.pdf
    • http://bodysagespa.com/uploads/1/3/0/7/130740573/lesejuwerajogebafova.pdf
    • http://enamelchannel.com/uploads/1/3/0/6/130639517/genub-zadefulelovo-jeriroru.pdf
    • http://radiantlifeacademy.org/uploads/1/3/0/3/130323281/5251503.pdf
    • http://hhinternational.net/uploads/1/3/0/2/130289417/tuwudowerefob_xawinotobulumiz.pdf
    • http://noeticpractices.com/uploads/1/3/0/6/130639913/7333f2d4431.pdf
    • http://cellsys.co.za/uploads/1/3/0/6/130639074/6512072.pdf
    • http://cakenetwork.us/uploads/1/3/0/6/130604885/2429679.pdf
    • http://trk-kirovskiy.ru/uploads/2020/01/28/ritajibavizugok_wuwomipop_mobip.pdf
    • http://sewifuga.dimeka.ru/uploads/2020/01/28/kixujotowi_fagoju_mikakipufog_puwezol.pdf
    • http://arcadiagardensllclandscapinganddesign.com/uploads/1/3/0/6/130639869/130639869.html#difference+of+basel+1+2+and+3

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000013e3.bin
9aa5f6c27794755461766728e660ed52d0e27db502f63fdb4739556c7292e330		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13E3 9536 bytes
font_01_sfnt_off00007311.bin
83d89f79375f7f339e88070a8779324ce221c94923bff415e388e162fbc46cfe		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7311 2604 bytes

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