Malicious PDF — malware analysis report

Static analysis result for SHA-256 8923ccc75f4d34ac…

MALICIOUS

PDF

37.0 KB Authoring application: pdf-parser
MD5: ecd490e8fd068ee3fdd010b6449a7f4c SHA-1: e6163f87283d7e89e041d6a0d15e0d6f1f2e4d3a SHA-256: 8923ccc75f4d34ac83786d3adc50909b8188f2fc58250daa2844f2fc4cceb26d
152 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell

The PDF contains a large number of embedded URLs pointing to external PDF files, a technique often used for SEO spam or to redirect users to malicious content. The ClamAV detection 'Pdf.Phishing.TtraffRobotInstall-7605656-0' and the ML classifier strongly indicate malicious intent. The heuristic 'PDF_SEO_LINK_FARM' confirms the presence of a link farm, suggesting the primary goal is to drive traffic to these linked resources.

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://modestotowingservice.com/uploads/1/3/0/5/130589251/tutubakerik.pdf
    • http://ngundua.info/uploads/1/3/0/3/130323538/0f2029bffb55.pdf
    • http://raghavmehta.com/uploads/1/3/0/2/130291975/7978361.pdf
    • http://myswagbag.org/uploads/1/3/0/2/130270832/5804606.pdf
    • http://jccartstudios.org/uploads/1/3/0/6/130605238/1961265.pdf
    • http://smart-k9.com/uploads/1/3/0/2/130289754/7324950.pdf
    • https://zojexavabarix.weebly.com/uploads/1/3/0/2/130289214/sofokiginera.pdf
    • http://mynkamorris.com/uploads/1/3/0/3/130324385/torejenufabodanuja.pdf
    • http://dancinggoatsanctuary.com/uploads/1/3/0/8/130874066/130874066.html#what+is+the+difference+between+stakeholder+and+shareholder

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000113d.bin
79a612df07c5dd56a891af845254fab46fca6add6d14655b5108f9dd32439be4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x113D 7528 bytes

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