Malicious PDF — malware analysis report

Static analysis result for SHA-256 23447d190f56e762…

MALICIOUS

PDF

43.1 KB Created: 2020-08-14 11:56:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fd644e7e16f7ce7689dfffc47ffded9e SHA-1: 3efb80391faa4a3893bffde82962def1c3a421f8 SHA-256: 23447d190f56e762e28c36c1e2fb911c4b6af0b1120558c3b5afc754820300fe
140 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link and a large number of embedded links to external PDFs, suggesting a link farm or phishing lure. The document body, though heavily obfuscated, contains the string 'https://ttraff.cc/pify?keyword=dcfs+cants+forms', which is flagged as a malicious redirector. The presence of numerous Shopify-hosted PDF links indicates an attempt to obscure the final destination or to create a broad distribution network. No scripts were extracted from this sample.

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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns
  • 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.cc/pify?keyword=dcfs+cants+forms
    • http://files.musicteachers.london/uploads/1/3/0/9/130969724/6861d6601d.pdf
    • http://files.canineharmony.ca/uploads/1/3/1/8/131856333/3345280.pdf
    • http://files.yukondaffodils.com/uploads/1/3/0/7/130738903/zezomubenafev.pdf
    • https://cdn.shopify.com/s/files/1/0428/4959/9651/files/vategexolugozarabu.pdf
    • https://cdn.shopify.com/s/files/1/0427/9179/6902/files/81328598382.pdf
    • https://cdn.shopify.com/s/files/1/0428/7240/6179/files/duwezixubem.pdf
    • https://cdn.shopify.com/s/files/1/0431/6410/6908/files/69906107574.pdf
    • https://cdn.shopify.com/s/files/1/0435/9041/8591/files/28354486276.pdf
    • https://cdn.shopify.com/s/files/1/0431/6472/9512/files/vewikuluvanenusorukegix.pdf
    • https://cdn.shopify.com/s/files/1/0429/2929/1427/files/letabegesulerukigemot.pdf
    • https://cdn.shopify.com/s/files/1/0440/9357/1224/files/yah_trick_ya.pdf
    • https://cdn.shopify.com/s/files/1/0429/5321/2057/files/67630479398.pdf
    • https://cdn.shopify.com/s/files/1/0433/8827/2807/files/fomilubudadomurorofutejob.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_off00006a86.bin
6b25a58396c61a6f8a8039c330c9183c2af5a8f8734165e3edb2689ab4472494		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A86 4996 bytes
font_01_sfnt_off00007b69.bin
480f392b38e929ffe41e2a451eb6aa7498d9fff94254dca6fcd33310f6041fcc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B69 10796 bytes

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