Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca38ffa7ddf7a1e1…

MALICIOUS

PDF

34.7 KB Authoring application: QPDF
MD5: d1f2b3e512ce9f1a88efb6dacda798bb SHA-1: 5a69e6c9ce02bf62822858710882b2dc8e4097a2 SHA-256: ca38ffa7ddf7a1e1a29e151197583ec9715c0c9cdbadfdb79771bab8bb676913
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File

The PDF contains a large number of embedded URLs pointing to other PDF files, indicating a link farm or distribution mechanism. ClamAV detected this as Pdf.Phishing.TtraffRobotInstall, suggesting a phishing or traffic redirection scheme. The ML classifier also strongly flagged this as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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://namkoorbindustries.com/uploads/1/3/0/6/130604205/lexepizasejepekis.pdf
    • http://atyogautopia.com/uploads/1/3/0/2/130289649/7186f9163.pdf
    • http://cphmail.com/uploads/1/3/0/6/130621216/e470da.pdf
    • http://www.sparklecult.com/uploads/1/3/0/7/130775978/refap.pdf
    • http://acadiaextracts.com/uploads/1/3/0/3/130313671/8392555.pdf
    • http://soakupthesolstice.com/uploads/1/3/0/3/130379458/8077031.pdf
    • http://arminhoffmann.com/uploads/1/3/0/6/130620530/b00b0d174.pdf
    • http://theknittingroom.co.uk/uploads/1/3/0/2/130287318/0419ee7.pdf
    • http://literary.cafe/uploads/1/3/0/5/130551126/ruxaxuwanozezabo.pdf
    • http://theludditepress.com/uploads/1/3/0/3/130323148/zulewokif.pdf
    • http://seattle2025.org/uploads/1/3/0/7/130738715/madamarikigigajuwa.pdf
    • http://vn55.brdge.org/uploads/1/3/0/6/130620632/130620632.html#training+needs+analysis+example+-+general+competencies
    • http://arminhoffmann.com/uploads/1/3/0/6/13062053

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000316d.bin
1a3e34ba9e1e0318132570ab9218634c24753816f52bce0daf974817e177ba55		 pdf-font-stream PDF embedded font (sfnt) at offset 0x316D 7680 bytes

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