Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f2ed5ba6af01355…

MALICIOUS

PDF

42.8 KB Created: 2020-09-28 16:58:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0232967a30dabbcc45714516ef72a1bd SHA-1: 1d71c2dbec2327275b226ada90e2a6b6d733547c SHA-256: 8f2ed5ba6af01355a4188f203ef00c9d6915088b06c70c7a9a72d0e1f32b2353
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a mass external link farm, with many links pointing to benign Shopify URLs, but one critical link to a known malicious redirector at cctraff.ru. The document body, though heavily obfuscated, contains the URL https://cctraff.ru/mozel?keyword=budget+plan+template+pdf, suggesting a lure to disguise malicious redirection. The ML classifier 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=budget+plan+template+pdf
    • http://files.misfitangelsrescue.org/uploads/1/3/0/9/130969686/3319307.pdf
    • http://files.rusticrevivalco.com/uploads/1/3/1/3/131379992/wuleg.pdf
    • https://site-1036812.mozfiles.com/files/1036812/74774665884.pdf
    • https://site-1037124.mozfiles.com/files/1037124/kajewitewafajominepozona.pdf
    • https://site-1036869.mozfiles.com/files/1036869/navixipukoz.pdf
    • https://site-1037035.mozfiles.com/files/1037035/fukapikado.pdf
    • https://site-1036848.mozfiles.com/files/1036848/61301166991.pdf
    • https://site-1036724.mozfiles.com/files/1036724/22478120995.pdf
    • https://site-1036975.mozfiles.com/files/1036975/mamijijudogazewadovix.pdf
    • https://site-1037224.mozfiles.com/files/1037224/29219334139.pdf
    • https://site-1036627.mozfiles.com/files/1036627/70509216941.pdf
    • https://site-1036635.mozfiles.com/files/1036635/38374856024.pdf
    • https://cdn.shopify.com/s/files/1/0431/3468/1250/files/fiba_official_basketball_rules.pdf
    • https://cdn.shopify.com/s/files/1/0433/6097/7048/files/xukilixuxube.pdf
    • https://cdn.shopify.com/s/files/1/0427/8065/5775/files/81276249094.pdf
    • https://cdn.shopify.com/s/files/1/0431/0505/8976/files/86743809619.pdf
    • 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006a3c.bin
6a720fe32c2214bfe5463feb921c29b21b81abd0ec61efc8d47507431de79eac		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A3C 5136 bytes
font_01_sfnt_off00007bb4.bin
4253500752582005685d9d228fca04bf923405d5bbe83dd3cc5a310262b0c990		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7BB4 10184 bytes

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