Malicious PDF — malware analysis report

Static analysis result for SHA-256 161b124be5f78ff6…

MALICIOUS

PDF

35.0 KB Authoring application: GIMP
MD5: bd72ffae8fd53e356ad70750fafcfb2b SHA-1: 690f88b1520f5bf20e3e31b29a37fb87a45c2aa0 SHA-256: 161b124be5f78ff625fc1ad5cc44567470e5b7f1bc08df9381f3c87d4f2911ad
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 other PDF files, disguised as a datasheet. This behavior is indicative of a link farm or a phishing lure designed to redirect users to malicious content. The ClamAV detection as 'Pdf.Phishing.TtraffRobotInstall-7605656-0' further supports the malicious intent.

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://meyersmpg.com/uploads/1/3/0/4/130483459/juloguvene.pdf
    • http://southernrugs.com/uploads/1/3/0/5/130545932/4bc382968.pdf
    • https://wezawirikal.weebly.com/uploads/1/3/0/4/130483213/minenigosiduruw.pdf
    • http://msgroft.weebly.com/uploads/1/3/0/6/130604981/ab3f5df2f7.pdf
    • http://tavoxuteg.laritelle.org/uploads/2020/01/29/9409802.pdf
    • http://misssoutheastpageantry.us/uploads/1/3/0/6/130605167/130605167.html#schneider+ion8650+datasheet

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000107c.bin
c693071fba83ee6b3d31a1d915e482f659b5229e580cca047e26571e34c88eff		 pdf-font-stream PDF embedded font (sfnt) at offset 0x107C 8404 bytes

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