Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec0d2487fda2a11a…

MALICIOUS

PDF

38.9 KB Created: 2020-09-02 13:53:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4816f991ba8b30eaeb5979a6ba799f9e SHA-1: 4a82e3baf1b9cb76482b9f83c23b445283ce41c1 SHA-256: ec0d2487fda2a11a1f5100f35238494f8b50d7bfb24ba1035244072bd886cd08
120 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with a critical heuristic firing for a malicious redirector link. The primary malicious URL identified is https://ttraff.me/wix?keyword=greeting+worksheet+grade+1. While many other links point to benign Shopify domains, the presence of the redirector indicates a malicious intent to lure the user to a harmful site. No scripts were extracted, and the document body is heavily obfuscated.

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.me/wix?keyword=greeting+worksheet+grade+1
    • https://cdn.shopify.com/s/files/1/0431/3094/5693/files/86765416300.pdf
    • https://cdn.shopify.com/s/files/1/0457/6745/8980/files/conan_exiles_raiding_guide_2019.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/zorugeligix.pdf
    • https://cdn.shopify.com/s/files/1/0438/3460/5728/files/kimulig.pdf
    • https://static.usrfiles.com/ugd/b8c837_5b60b0c50f844d458b006f84c3d5d206.pdf
    • https://cdn.shopify.com/s/files/1/0430/7812/3680/files/falunavitoresefova.pdf
    • https://cdn.shopify.com/s/files/1/0432/0159/3507/files/zojevodipadupotaf.pdf
    • https://cdn.shopify.com/s/files/1/0437/4285/5319/files/48519068953.pdf
    • https://cdn.shopify.com/s/files/1/0430/6314/8706/files/91406197236.pdf
    • https://cdn.shopify.com/s/files/1/0448/0339/1645/files/grammar_and_vocabulary_for_the_toeic_test_with_answers.pdf
    • https://cdn.shopify.com/s/files/1/0433/1231/6584/files/fezibonewol.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_off000059fd.bin
4ef2e49455ca35afad8d9cd26ce9f00230721d316aba2acbf157856d0d08ba97		 pdf-font-stream PDF embedded font (sfnt) at offset 0x59FD 5292 bytes
font_01_sfnt_off00006c13.bin
3f128ca5926e1cf6c92102ec5324aec9600bd99211b20f0cb40c07d255b63d43		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C13 10360 bytes

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