Malicious PDF — malware analysis report

Static analysis result for SHA-256 d37c3ff4ceb11ba3…

MALICIOUS

PDF

40.4 KB Created: 2020-08-18 17:46:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 472a84551f2ecdb94a0b96bbee891807 SHA-1: 05341eeb5dad5230d8e37290fd8a7ab5a1c596dc SHA-256: d37c3ff4ceb11ba37a8e0a29567190726b86013fc9b82fadbd7d12c59511b66d
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, with a critical heuristic firing indicating a malicious redirector link to 'ttraff.ru'. Another critical heuristic identified a PDF link farm, with many links pointing to Shopify domains. The document body itself is heavily obfuscated but contains the same malicious URL. The primary intent appears to be directing users to malicious infrastructure through a link farm.

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/pify?keyword=tabloid+newspaper+template+indesign+free
    • http://files.silvastudioart.com/uploads/1/3/1/3/131383727/c2b014a40.pdf
    • https://cdn.shopify.com/s/files/1/0437/5881/3341/files/sap_basis_certification_questions_and_answers.pdf
    • https://cdn.shopify.com/s/files/1/0434/7654/9798/files/rufitujoretil.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/70945418412.pdf
    • https://cdn.shopify.com/s/files/1/0436/0998/1085/files/sufigixubamowakusanov.pdf
    • https://cdn.shopify.com/s/files/1/0432/9698/1147/files/10756943936.pdf
    • https://cdn.shopify.com/s/files/1/0434/3398/4162/files/loxujanepa.pdf
    • https://cdn.shopify.com/s/files/1/0435/5863/3627/files/rusofuxugu.pdf
    • https://cdn.shopify.com/s/files/1/0437/6992/1688/files/konewepikewakogajavodo.pdf
    • https://cdn.shopify.com/s/files/1/0436/0824/4381/files/smoke_on_the_water_drum_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0436/0149/4179/files/89914596565.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_off00006012.bin
33b74c490bb85a79e5e71803a176dc31d48e9607587d8ea5796f81c8e441ebdb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6012 5540 bytes
font_01_sfnt_off000072e2.bin
b6c9304bb03697f1dc6c667836992711745cda636d4e790f7498b4d79a055665		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72E2 10060 bytes

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