Malicious PDF — malware analysis report

Static analysis result for SHA-256 584935ef9406eaab…

MALICIOUS

PDF

45.4 KB Created: 2020-08-31 11:08:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8a43ac53df8888422c7166508ba7a7cc SHA-1: fe05173fc0d977f9b94531eca6484880c68e791d SHA-256: 584935ef9406eaabdb6043b1f53d2f5294aafdcf36abad145dc9651cbe9793b9
120 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded links, constituting a link farm designed to direct users to malicious infrastructure. The primary malicious URL identified is https://ttraff.com/wix?keyword=conjunction+exercise+with+answers+fo, which is flagged as a known malicious redirector. The document body, though heavily obfuscated, contains references to this URL and other PDF files hosted on Shopify and static file hosting services, suggesting a lure to disguise the malicious intent.

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/wix?keyword=conjunction+exercise+with+answers+fo
    • https://cdn.shopify.com/s/files/1/0435/3156/7256/files/rezawemodawufikumopewuv.pdf
    • https://cdn.shopify.com/s/files/1/0429/6104/3605/files/safiled.pdf
    • https://cdn.shopify.com/s/files/1/0435/2091/7668/files/98068177865.pdf
    • https://cdn.shopify.com/s/files/1/0433/2588/2518/files/bipimusetokomazufota.pdf
    • https://cdn.shopify.com/s/files/1/0451/1947/1781/files/54240581001.pdf
    • https://static.usrfiles.com/ugd/b8c837_fc6b6f62d3b24825a46cfaf80c404621.pdf
    • https://static.usrfiles.com/ugd/b8c837_9fe1553ecdae4eecb60b0f9f62da6e08.pdf
    • https://static.usrfiles.com/ugd/a107db_645cdfa9baa24ac4b06c5a2be47e7cfa.pdf
    • https://static.usrfiles.com/ugd/b8c837_6095cd605a4b43bca7bb6f59728d8c0f.pdf
    • https://static.usrfiles.com/ugd/f3cb45_5115e7009e644bf1a06fc7a136e987eb.pdf
    • https://static.usrfiles.com/ugd/d7ba0f_45ae417fb27d49a2932b0b74436a0bde.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_off000074a4.bin
462b172b4d7ed5f3156950784813c70e960e2d3aafc47d9b8ba8d29d4f71bfa3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74A4 5080 bytes
font_01_sfnt_off00008602.bin
862f7feead58f1f81f2a29776662e8b0256cc4a014013e821c0f5262b3d9cf3f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8602 10252 bytes

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