Malicious PDF — malware analysis report

Static analysis result for SHA-256 3672d0ce737b00aa…

MALICIOUS

PDF

47.9 KB Created: 2020-08-05 17:15:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 653e024a7ba5e6f1cdcc28a85f23b5d6 SHA-1: 09e59a670319cc1e3b0419019f6a23c549d38b9f SHA-256: 3672d0ce737b00aa855d53e6ce28df209fc968a115046aade14872e9e97cf85f
120 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, which is also present in the document body. The link is disguised with a keyword suggesting a textbook, likely to trick users into clicking. The PDF also contains a large number of external links, many pointing to Shopify domains, suggesting a link farm for SEO poisoning or to obscure the malicious redirector. No scripts were extracted from this sample.

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.com/pify?keyword=further+mathematics+textbook+pdf
    • http://kilux.cynchitpants.com/uploads/1/3/0/7/130776445/98a23.pdf
    • http://files.alamedaaquaticmasters.com/uploads/1/3/1/4/131409709/2793285.pdf
    • http://files.atarborists.com/uploads/1/3/2/7/132740253/xuxemetukigivegibogo.pdf
    • https://cdn.shopify.com/s/files/1/0430/3912/9751/files/edit_free_mac_os_x.pdf
    • https://cdn.shopify.com/s/files/1/0433/7978/5891/files/22929075029.pdf
    • https://cdn.shopify.com/s/files/1/0432/2826/6654/files/vefelutazopobufidepe.pdf
    • https://cdn.shopify.com/s/files/1/0431/6404/1373/files/11941253841.pdf
    • https://cdn.shopify.com/s/files/1/0430/3690/1527/files/22805824511.pdf
    • https://cdn.shopify.com/s/files/1/0431/6764/5852/files/livoremakumipebofagur.pdf
    • https://cdn.shopify.com/s/files/1/0434/5508/6742/files/16170533508.pdf
    • https://cdn.shopify.com/s/files/1/0434/0216/6428/files/op_factions_servers.pdf
    • https://cdn.shopify.com/s/files/1/0429/4960/7590/files/woduzawekinedo.pdf
    • https://cdn.shopify.com/s/files/1/0431/4831/2736/files/41661433081.pdf
    • https://cdn.shopify.com/s/files/1/0429/1962/4870/files/tixenolugip.pdf
    • https://cdn.shopify.com/s/files/1/0432/9465/4632/files/tilabebutin.pdf
    • https://cdn.shopify.com/s/files/1/0434/7055/3250/files/tajew.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/pizegavegip.pdf
    • https://cdn.shopify.com/s/files/1/0434/1648/6040/files/segewajot.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_off00007bde.bin
2d72bb08895e7b721f54841e6988615739919eab519e100ebccb9eab3dc62aa2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7BDE 5592 bytes
font_01_sfnt_off00008eb4.bin
71e20658fae9c298184dd41a7a12b3a12efd165601a8d4ad737862328f1659eb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8EB4 10532 bytes

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