Malicious PDF — malware analysis report

Static analysis result for SHA-256 24cd9264ab03f424…

MALICIOUS

PDF

35.2 KB Created: 2020-08-31 08:24:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: aa2f3eb3212802998565a46e3617bfbf SHA-1: 109b1a47e8407cf25641478193b766810aa8453c SHA-256: 24cd9264ab03f424c4cc0ceda7f5a87cb4f462839c6bb79498aad34e9bc6b75f
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/wix?keyword=clash+of+clan+serveur+priv%25C3%25A9'. Additionally, it exhibits characteristics of a PDF SEO link farm, with numerous links to Shopify-hosted PDFs. The document body, though heavily obfuscated, contains the same malicious URL, suggesting a lure to a fake game server page. The ML classifier also strongly indicated maliciousness.

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://ttraff.ru/wix?keyword=clash+of+clan+serveur+priv%25C3%25A9
    • https://cdn.shopify.com/s/files/1/0431/8085/1364/files/96251190272.pdf
    • https://cdn.shopify.com/s/files/1/0434/3015/0296/files/bulawayo_city_map.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/damegadunuje.pdf
    • https://cdn.shopify.com/s/files/1/0432/4206/1986/files/linkedin_boolean_search.pdf
    • https://cdn.shopify.com/s/files/1/0431/5919/1712/files/weather_report_bandarugudem.pdf
    • https://cdn.shopify.com/s/files/1/0431/0060/2525/files/nozarolenut.pdf
    • https://cdn.shopify.com/s/files/1/0441/2011/3304/files/basic_accounting_quiz.pdf
    • https://cdn.shopify.com/s/files/1/0432/7201/1932/files/free_wedding_budget_spreadsheet_ideas.pdf
    • https://cdn.shopify.com/s/files/1/0435/8511/0177/files/romamesuxelufidikusi.pdf
    • https://cdn.shopify.com/s/files/1/0431/9562/9725/files/18190416370.pdf
    • https://cdn.shopify.com/s/files/1/0431/3828/5734/files/89096583502.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/94662163826.pdf
    • https://cdn.shopify.com/s/files/1/0435/1324/9944/files/anyong_lupa_at_anyong_tubig_sa_asya.pdf
    • https://cdn.shopify.com/s/files/1/0430/2562/9335/files/kagumepiridisozivojaxu.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_off00004ad4.bin
671cfbbd292fd0d6160ad9c955b6f57ee975ad07994220f54ea93bbe2e54a605		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4AD4 5208 bytes
font_01_sfnt_off00005c3f.bin
6f92f52d9148fe6700d67d8d5fa105bd0aa42852c15fa8d1fada5868c28adf16		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C3F 10012 bytes

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