Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc2c50c3be17c646…

MALICIOUS

PDF

50.8 KB Created: 2020-09-28 16:57:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 01c8c3609fd70ce9b6044e9ec11e26cd SHA-1: 15c1cffc9c29628c8a9749705a66e33a7ea636b1 SHA-256: cc2c50c3be17c646d31ccc7c5f5fe3b11d54db7be6a01f9d988ad8f18a83d57f
150 Risk Score

Malware Insights

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

The PDF contains numerous embedded links designed to redirect users to malicious websites, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK and PDF_SEO_LINK_FARM heuristics. The document body, though heavily obfuscated, contains a URL that aligns with the malicious redirection pattern. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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 https://cctraff.ru/mozel?keyword=cbse+books+for+class+8+maths+pdf
    • http://files.pinnacleflycutter.com/uploads/1/3/0/9/130969561/bewizude_loxufakanepona_rogedozokovibot_puxal.pdf
    • http://files.lymeaustralia.com/uploads/1/3/1/6/131606035/zixoredote.pdf
    • http://files.cochranetotaltree.com/uploads/1/3/1/6/131607331/8197360.pdf
    • https://site-1036832.mozfiles.com/files/1036832/23093636794.pdf
    • http://files.terrilundquist.com/uploads/1/3/1/1/131163838/102226.pdf
    • http://vewodemi.clientsviews.com/uploads/1/3/0/8/130874411/a06ebcc9d54.pdf
    • http://files.broadstonefootballclub.co.uk/uploads/1/3/0/7/130740084/90209dc20dc5.pdf
    • http://files.artyxan.com/uploads/1/3/0/7/130739504/wiveguwukajujox.pdf
    • http://files.pacetrailseries.com/uploads/1/3/1/4/131406435/3307131.pdf
    • https://ebfbf0a4-36c5-4902-b04f-25f93a3a3587.filesusr.com/ugd/361f4b_db1149e399aa4028aa1956d6b8e4d682.pdf?index=true
    • https://8d33c333-2520-49e4-9997-1b968205ef40.filesusr.com/ugd/9c8fb9_4c3415349e59492fb6aa6c625dd7d6f5.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007335.bin
034cec48868b2bf0f03a41d4556f318eb143d4da5ecbacbe76063670bddc4af3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7335 5700 bytes
font_01_sfnt_off0000866d.bin
6afb78200427567c2806c2bff737054867a981b02894d73775434545f01a364d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x866D 10148 bytes
font_02_sfnt_off0000a92e.bin
b1615e29a4fe6c7320d553a30418b4fece26933a192be804fa4a6c1955e67a67		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA92E 16068 bytes

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