Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba2af1a5f501c2db…

MALICIOUS

PDF

50.1 KB Created: 2020-09-04 03:59:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b6470790d687736c89ddc0f96277ce09 SHA-1: 965d7fe7585220224c82cc3a2dede10db3483aa0 SHA-256: ba2af1a5f501c2db522b1113135ca862dab588e52b5b76dd5e81d74556269d5a
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.me'. The document body, though heavily obfuscated, contains text that appears to be a lure related to 'Les cercles de la forme dauphine' and includes the malicious URL. The presence of numerous Shopify links, while mostly benign, suggests an attempt to blend in or use legitimate platforms for hosting. The ML classifier also strongly indicated maliciousness.

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.me/wix?keyword=les+cercles+de+la+forme+dauphine+avis
    • https://cdn.shopify.com/s/files/1/0445/2777/9999/files/20942569555.pdf
    • https://cdn.shopify.com/s/files/1/0432/7401/0782/files/implementation_plan_template_doc.pdf
    • https://cdn.shopify.com/s/files/1/0430/8592/2466/files/kopilewow.pdf
    • https://cdn.shopify.com/s/files/1/0431/0204/4316/files/catalase_temperature_lab_report.pdf
    • https://cdn.shopify.com/s/files/1/0428/2603/9463/files/roxofagozosobito.pdf
    • https://cdn.shopify.com/s/files/1/0434/2962/6017/files/fixuzenegexo.pdf
    • https://cdn.shopify.com/s/files/1/0429/9581/0455/files/21203082964.pdf
    • https://cdn.shopify.com/s/files/1/0433/6910/3528/files/83720696553.pdf
    • https://cdn.shopify.com/s/files/1/0432/7217/5784/files/wusabatanuwekezoragifiv.pdf
    • https://cdn.shopify.com/s/files/1/0432/7528/8742/files/7th_grade_go_math_textbook.pdf
    • https://cdn.shopify.com/s/files/1/0430/1540/5725/files/96694619569.pdf
    • https://cdn.shopify.com/s/files/1/0428/7594/5126/files/nunidukejepasikalefevo.pdf
    • https://cdn.shopify.com/s/files/1/0459/6973/5847/files/open_source_intelligence_techniques_5th_edition_2016.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_off000080c6.bin
bb239726937db4df9a49d69b82e23915b6842ce48350bb20bdefe74241e71d50		 pdf-font-stream PDF embedded font (sfnt) at offset 0x80C6 5396 bytes
font_01_sfnt_off00009300.bin
a8f12a0f872fc2b47b75da089965e1d40e33089dd365236b31fe9737208d830f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9300 12344 bytes

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