Malicious PDF — malware analysis report

Static analysis result for SHA-256 580a344ab3d0373a…

MALICIOUS

PDF

104.3 KB Created: 2020-09-18 10:13:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 734a5af0cdb8faae78419f17870d9656 SHA-1: 0efad7e4a76cc4fe14a0f44008f1c3be058e27c3 SHA-256: 580a344ab3d0373a187ce274815f0f04c01237d7e3268e4654584d88598671cf
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 Malicious Link T1059.001 PowerShell

The PDF contains a link that redirects to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains the URL 'https://ttraff.com/wix?keyword=howard+zinn+chapter+11+answers', which is the primary indicator of malicious intent. The PDF_SEO_LINK_FARM heuristic suggests this PDF is part of a larger link farm designed to attract traffic.

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=howard+zinn+chapter+11+answers
    • https://64867596-e1ed-4860-b431-f499461b30e8.filesusr.com/ugd/221eaa_5cca7a424db048699900a7edb5fb99e8.pdf?index=true
    • https://7b75a082-b225-421c-8534-7fe7425a5e44.filesusr.com/ugd/21e6f2_3f9273bea9b44cd889128ff472a9b1b1.pdf?index=true
    • https://3f6aed1b-b677-4c46-a55a-21342b3c43e4.filesusr.com/ugd/f84671_c1030e1c128e49cfb19551e799d34230.pdf?index=true
    • https://b28c6ade-0f41-4b62-a6d4-0e5beb1a74d0.filesusr.com/ugd/4dbf3f_b6e4856e3703475ea20593d0d7b4dad5.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0428/4927/1975/files/85051631592.pdf
    • https://cdn.shopify.com/s/files/1/0437/3794/0133/files/34553236073.pdf
    • https://cdn.shopify.com/s/files/1/0435/7193/7441/files/nifonatagirafevofiluwip.pdf
    • https://cdn.shopify.com/s/files/1/0434/1753/4629/files/gakekozulabuxerelakek.pdf
    • https://cdn.shopify.com/s/files/1/0440/8888/5413/files/present_perfect_tense_grammar_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0462/2955/3301/files/bisopofuguvawutuxuwunojut.pdf
    • https://cdn.shopify.com/s/files/1/0438/9309/6600/files/denotation_and_connotation_exercises_with_answers.pdf
    • https://cdn.shopify.com/s/files/1/0438/4640/2198/files/halloween_worksheets_primary.pdf
    • https://cdn.shopify.com/s/files/1/0481/3779/7794/files/nba2k14_apk_android_1.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_off00015de6.bin
45453c4cb5fe421ac0d4af06a76064334a810add36df2a0517928bc320e30c3a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15DE6 5284 bytes
font_01_sfnt_off00016ff9.bin
54944d1365c17c7d7b705536e109f3ff356c712334b3834563748d7790e02714		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16FF9 10628 bytes

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