Malicious PDF — malware analysis report

Static analysis result for SHA-256 e936b0756716b0d8…

MALICIOUS

PDF

40.6 KB Created: 2020-09-02 00:12:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a5a04c039b7d94f9f98e920a079bf968 SHA-1: c78741d96b2277391c44bcb582fb0da9625be441 SHA-256: e936b0756716b0d8cb5d2be1b7ec73255ebfb8b0a6897b02bcab14e726df229e
150 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, presented under the guise of a recipe, that redirect to malicious infrastructure. The primary malicious URL identified is https://ttraff.cc/wix?keyword=chocolate+sheet+cake+recipe+without+buttermilk. The document's structure and content suggest a lure to trick users into clicking malicious links, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.cc/wix?keyword=chocolate+sheet+cake+recipe+without+buttermilk
    • https://static.usrfiles.com/ugd/b8c837_d9241e52ab424c03988c79654fa4195f.pdf
    • https://static.usrfiles.com/ugd/e02969_c6fc740bf7c44924878229c1ce14c43b.pdf
    • https://static.usrfiles.com/ugd/4cf28d_afd5abe9a8e44caa99d705f9afe135bf.pdf
    • https://static.usrfiles.com/ugd/b91566_d1306bc5b3d44345b5908b3259c09967.pdf
    • https://cdn.shopify.com/s/files/1/0438/1373/2512/files/rurouni_kenshin_subtitles.pdf
    • https://cdn.shopify.com/s/files/1/0438/9208/0795/files/mijakojevubobop.pdf
    • https://cdn.shopify.com/s/files/1/0437/6900/4190/files/free_queen_platform_bed_storage_plans.pdf
    • https://static.usrfiles.com/ugd/8dde66_fa4b3961c6844812a28358179c30d9e3.pdf
    • https://static.usrfiles.com/ugd/906e9f_d5a86e2ab6aa4a7a8a2ee60be484cbcb.pdf
    • https://static.usrfiles.com/ugd/b8c837_81d617f85a66486da067242511db2bf0.pdf
    • https://static.usrfiles.com/ugd/83d902_b3b96649402f46d99da9afe1b02f4024.pdf
    • https://static.usrfiles.com/ugd/ed2d23_f86238478c6e43f8a79399e462ee1437.pdf
    • https://static.usrfiles.com/ugd/963627_50b42971e5d04aa0a72a23e5ef5779ad.pdf
    • https://static.usrfiles.com/ugd/0bcf16_27b775e7b5194f60aeb0c04b583cf51c.pdf
    • https://static.usrfiles.com/ugd/0ebc1f_95ed02bbdf1b4fba801a7fdbfbad072b.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_off00006102.bin
abc26a844129074ce60bc6af071370c7cfa558b784a36b1f092ebf67969b19d1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6102 5376 bytes
font_01_sfnt_off0000732a.bin
b3e1b7138c862a0269a06a4214bfc66069ba256ca4d666bd12448fff5d1d5180		 pdf-font-stream PDF embedded font (sfnt) at offset 0x732A 9988 bytes

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