Malicious PDF — malware analysis report

Static analysis result for SHA-256 7186a4a1a0b6a6e1…

MALICIOUS

PDF

33.0 KB Authoring application: Poppler-utils
MD5: 1de09cd741456194c78091573f3056af SHA-1: 7af2785570086f418e69ba79b592390f80882dce SHA-256: 7186a4a1a0b6a6e134aa1a240c65940648b858439b1f866fa1a906ffee5865b8
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded links to external PDF files hosted on various domains, as indicated by the PDF_SEO_LINK_FARM heuristic. ClamAV also detected this as Pdf.Phishing.TtraffRobotInstall-7605656-0, suggesting a phishing or redirection campaign. The ML classifier output of 0.999791 further supports its malicious nature. The embedded URLs are the primary IOCs, likely leading to further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://moikaitrading.com/uploads/1/3/0/7/130738576/dodizupe.pdf
    • http://slavetobadboys.com/uploads/1/3/0/2/130288359/2a3f108f7cf07.pdf
    • http://ya-amar.com/uploads/1/3/0/6/130604251/4231524.pdf
    • http://nancyleong.com/uploads/1/3/0/6/130639538/jadusesudo.pdf
    • http://murrietasalvationarmy.org/uploads/1/3/0/5/130543074/e3e9bb7.pdf
    • http://aim-mississauga.org/uploads/1/3/0/5/130588468/juwota_zewibipipivume_garozixujunas_xutowosajadi.pdf
    • http://newstylemarket.com/uploads/1/3/0/5/130543816/130543816.html#addams+family+kindergarten+song+lyrics
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://fedoraproject.org/wiki/Licensing/LiberationFontLicense

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000129c.bin
ccbea05363471e80eaaaa19084d73f40e8d28ada3718c3c86add34a068fd51ee		 pdf-font-stream PDF embedded font (sfnt) at offset 0x129C 7436 bytes
font_01_sfnt_off0000452d.bin
84340d81b687e5658134e86d602934373e4edb1358290f916b35b324124d256a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x452D 2696 bytes

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