Malicious PDF — malware analysis report

Static analysis result for SHA-256 393480a9b222c2f1…

MALICIOUS

PDF

123.3 KB Authoring application: Poppler-utils
MD5: 12a22bb9f6b40cb46e5abeb503550752 SHA-1: f758bc94b04a33228e048a3a9ae005f06c745781 SHA-256: 393480a9b222c2f1f1b0fac9082e1bd9b77da817fb5d3f642160c96636337853
150 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to other PDF files. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as Pdf.Phishing.TtraffRobotInstall. The document body, though containing garbled text, mentions financial trading terms, suggesting a lure to download further malicious content disguised as relevant documents. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9805

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://namicas.com/uploads/1/3/0/5/130551059/5514828.pdf
    • http://merbeinhistoricalsociety.com.au/uploads/1/3/0/5/130590325/giresofipur.pdf
    • http://shine-bu.com/uploads/1/3/0/3/130313063/xidobuku_vurawu_lodowepafa_mejefi.pdf
    • http://thatanimalgroup.org/uploads/1/3/0/4/130475932/4486456.pdf
    • http://peggyleavitt.com/uploads/1/3/0/5/130588390/c978ff0f80ae8.pdf
    • http://djsacademy.com/uploads/1/3/0/4/130483527/130483527.html#natenberg+options+volatility+and+pricing+pdf

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001268.bin
59173cc8cfe07cfcd4b05c4a12c4c939936a537cffa2177738b757145b1e5b55		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1268 9984 bytes
font_01_sfnt_off00007fcc.bin
bda9b65bd4082af2803a1a474e933a5c15c42f170543b6e97983ec61800024e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7FCC 16040 bytes
font_02_sfnt_off0001ad75.bin
27b3267491967eb62af718bd96c6611c2f57114aba26d677bc31f0306da7f97d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1AD75 2648 bytes

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