Malicious PDF — malware analysis report

Static analysis result for SHA-256 b95ee8c1b8e55ff1…

MALICIOUS

PDF

125.5 KB Authoring application: Nitro PDF
MD5: ac8e90770868aabcd8737ed318a0f399 SHA-1: 3d6315260650029dd271101a1ced56a9655dd6f0 SHA-256: b95ee8c1b8e55ff199c695569716a70d4c511171e0875e13ebc2520a1cb9e78a
150 Risk Score

Malware Insights

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

The PDF contains a link farm designed to redirect users to various PDF files hosted on external domains. The ClamAV detection 'Pdf.Phishing.TtraffRobotInstall-7605656-0' and the 'PDF_SEO_LINK_FARM' heuristic strongly indicate a phishing or malicious redirection attempt. The embedded URLs are the primary indicators of compromise, likely serving as lures for further malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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://myecwc.com/uploads/1/3/0/5/130551994/bejope.pdf
    • http://newtesting.org/uploads/1/3/0/7/130739850/taliterojeveviwo.pdf
    • http://lashesbyalyssaabq.com/uploads/1/3/0/5/130551311/1233068.pdf
    • http://movalhome.net/uploads/1/3/0/5/130588751/ada62cef.pdf
    • http://birdhousepdx.com/uploads/1/3/0/7/130740019/130740019.html#case+in+point+10th+edition+pdf+download

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000011ec.bin
39de24031898ad90cdc3f38a40b7d4edf379041695406c119596fb3be0fbc99a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11EC 10608 bytes

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