Malicious PDF — malware analysis report

Static analysis result for SHA-256 b29676ec27853d8f…

MALICIOUS

PDF

79.7 KB Authoring application: PDF Studio
MD5: f965a383d1111f15fcd683e19c1c73a9 SHA-1: d860d2b3d89b01d77fafe8773f2b8e72f64c0d44 SHA-256: b29676ec27853d8febba32c3c348e64470f96db3b78ba066fc6ece639309547d
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded external links, a technique commonly used for SEO poisoning or to redirect users to malicious content. The ClamAV detection 'Pdf.Phishing.TtraffRobotInstall-7605656-0' and the ML classifier output strongly indicate malicious intent. The document body, though containing some garbled text, also includes several URLs pointing to PDF files on various domains, reinforcing the link farm heuristic. The primary attack pattern involves leveraging these links to deliver further malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://msdanahamilton.com/uploads/1/3/0/8/130813797/pegukisopuzep_robazujajenutes_datidog.pdf
    • http://ian-burnley.net/uploads/1/3/0/3/130313247/gejad.pdf
    • http://salonsirena.com/uploads/1/3/0/4/130476066/719d4c2a.pdf
    • http://doodlepadart.com/uploads/1/3/0/5/130590392/xexugujutedizatam.pdf
    • http://ww.r3nets.com/uploads/1/3/0/7/130776895/wiviv.pdf
    • http://axispoint.co/uploads/1/3/0/7/130776273/e006ce6edcf2b.pdf
    • http://algrealproperties.com/uploads/1/3/0/6/130604279/zoradusufuvemi_lalavopamo.pdf
    • http://criesinthenight.com/uploads/1/3/0/6/130639333/lipaburedapis-gujetedekalowi.pdf
    • http://rockchurchofthehighdesert.com/uploads/1/3/0/4/130476427/718629.pdf
    • http://batonrougenaturalhairexpo.com/uploads/1/3/0/2/130271090/fa19ff0.pdf
    • http://chinesebiblewiki.com/uploads/1/3/0/5/130588248/7352975.pdf
    • http://dididothat.net/uploads/1/3/0/5/130590058/6355896.pdf
    • http://bestofthewestmoving.com/uploads/1/3/0/6/130604788/nimuk_sumajekuga_dusazen.pdf
    • http://harrietarkley.com/uploads/1/3/0/6/130605194/5037258.pdf
    • http://moirarogers.net/uploads/1/3/0/6/130620417/493459.pdf
    • http://cpanel.t2troubleshooting.com/uploads/1/3/0/6/130639546/130639546.html#conversion+of+cartesian+to+spherical+coordinates

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000011c6.bin
9c985fe62d75da42c45041e4dbc18a82013d40c5072548a712b524b6759bd0dd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11C6 10480 bytes
font_01_sfnt_off0000d6c6.bin
c55d8639d3e4d0fa1e8b355a0030afe971bf74f41d77a047c012c0ec0b72c167		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD6C6 16596 bytes
font_02_sfnt_off0000ed8e.bin
65e78dc4cfc4218c998e8653d27acff130a702c171cc0d6075e6acf9abc80138		 pdf-font-stream PDF embedded font (sfnt) at offset 0xED8E 4216 bytes

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