Malicious PDF — malware analysis report

Static analysis result for SHA-256 44dea4f4d12cd62d…

MALICIOUS

PDF

64.5 KB Authoring application: PDF Studio
MD5: 031468dcaa98fb66eb9f43fb5a637052 SHA-1: f3a081f53776e1022a623654264f4b57cc36d817 SHA-256: 44dea4f4d12cd62de2aaee90ad3354db12da67f43af8e52b99a7697008807257
150 Risk Score

Malware Insights

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

The PDF contains a large number of external links, a common technique for phishing or distributing further malware. The ClamAV detection 'Pdf.Phishing.TtraffRobotInstall-7605656-0' and the 'PDF_SEO_LINK_FARM' heuristic strongly indicate a malicious intent to redirect users to potentially harmful sites. The embedded URLs are the primary indicators of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

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://meridiancorporatecenter.com/uploads/1/3/0/6/130620719/57c42cf04f.pdf
    • http://metallstroi37.ru/uploads/2020/01/27/fifabobodabejupuroki.pdf
    • http://mymalloryenglish218.com/uploads/1/3/0/5/130550930/jokojiduniniramul.pdf
    • http://gesupojebe.seo-spytnik.ru/uploads/2020/01/29/devoboduf.pdf
    • http://lesleyyx1.com/uploads/1/3/0/5/130543190/f7b38c4d05.pdf
    • http://ndtasanantonio.org/uploads/1/3/0/2/130287295/130287295.html#the+art+of+botanical+illustration+pdf

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001119.bin
cbe04811583db6bb5cb7f364e575fb7f5b6d1333c784e6053c1cca6c5d91529f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1119 8972 bytes
font_01_sfnt_off0000b7be.bin
779aa567746046747dac965df7fdfb06ff632674a0a99ce247a327bf89f0fa63		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB7BE 16036 bytes

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