Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a26aeec7d6d4753…

MALICIOUS

PDF

40.9 KB Created: 2020-08-21 05:16:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f9a7614bae4267f8b09cff3e9814b3d5 SHA-1: c5d246ea08e98c493ac9c9de36b23c3fdde0b94c SHA-256: 2a26aeec7d6d4753c813df6efafbfe143eb577f545ac492e296f6514a53d34c3
160 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, which points to 'https://ttraff.ru/pify?keyword=escritorio+remoto+para+movil+android'. This URL is combined with a high-risk lure for remote support tools, suggesting the document's intent is to trick the user into installing or connecting to such a tool. The PDF also contains a link farm, indicating a potential SEO poisoning or spamming campaign.

Heuristics 4

  • 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.
  • Remote-support tool lure high SE_REMOTE_SUPPORT_LURE
    Document instructs the user to install, open, or connect with a remote-support tool such as AnyDesk, TeamViewer, Quick Assist, or ScreenConnect — high-risk in an unsolicited document
  • 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/pify?keyword=escritorio+remoto+para+movil+android
    • http://files.davidfalkdesign.com/uploads/1/3/1/6/131636692/988579.pdf
    • http://files.amelieflorencedesigns.co.uk/uploads/1/3/2/7/132710753/28261a2.pdf
    • http://files.mrsvietnamworld.net/uploads/1/3/1/3/131382134/8386790.pdf
    • https://cdn.shopify.com/s/files/1/0429/2732/5343/files/55428721292.pdf
    • https://cdn.shopify.com/s/files/1/0431/9821/8400/files/ihk_berichtsheft_bayern.pdf
    • https://cdn.shopify.com/s/files/1/0431/2920/8992/files/17365263794.pdf
    • https://cdn.shopify.com/s/files/1/0430/8375/9765/files/tmux_split_vertical.pdf
    • https://cdn.shopify.com/s/files/1/0432/2636/6116/files/catherine_full_body_rin_route_guide.pdf
    • https://cdn.shopify.com/s/files/1/0433/9925/0072/files/47865802625.pdf
    • https://cdn.shopify.com/s/files/1/0430/2585/8714/files/56405041525.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/72905654063.pdf
    • https://cdn.shopify.com/s/files/1/0433/8457/0019/files/64256904143.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_off00005f2e.bin
f5cf2271ad0984475338e41fd07c887a689659c5d138cb0ce9fd4c73641b9b29		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F2E 5236 bytes
font_01_sfnt_off000070e5.bin
8ba4aaa41c3c590bcf2b76eecf79f6753d06ff884032e6a3654435d7e223fc5f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x70E5 11104 bytes

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