Malicious PDF — malware analysis report

Static analysis result for SHA-256 524c24e161f60629…

MALICIOUS

PDF

38.9 KB Authoring application: ImageMagick
MD5: 13a772ea352127e4402a866425c4c1f6 SHA-1: 0391447dd31e5be36abe7658f65d984c7c80dfb6 SHA-256: 524c24e161f60629be4925e3000c6b0bc2c758e2f2d3494c74f6d5c6b29f5c68
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs pointing to other PDF files on various domains, a technique often used for SEO spam or to distribute malicious payloads. 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, with the primary domain being nyspace.org.

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://nyspace.org/uploads/1/3/0/4/130483329/tofopidero-xiwubutukusafos-kivebixatuzug.pdf
    • http://jamesbaylee.com/uploads/1/3/0/6/130603824/12087287.pdf
    • http://bayflier.com/uploads/1/3/0/5/130551823/sonazasizanuzixuko.pdf
    • http://fitcoresmartmoves.com/uploads/1/3/0/5/130542718/64477e1421f2.pdf
    • http://psychotherapyportland.net/uploads/1/3/0/2/130288348/wokipa.pdf
    • https://mugeburusajo.weebly.com/uploads/1/3/0/4/130475892/4049e7fcf5edc22.pdf
    • http://wayneandbecca.com/uploads/1/3/0/5/130588214/4978773.pdf
    • http://somersetfoodtrail.org/uploads/1/3/0/5/130589007/130589007.html#historia+almacenes+exito+pdf

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000011cd.bin
58a90bde7b02720ed9acadc62248a12c62ff0e0a8e2e3a160b1bd3be03436942		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11CD 9804 bytes

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