Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e534464b2b1d740…

MALICIOUS

PDF

53.1 KB Created: 2020-08-29 03:37:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a6b17ca42b594bcbc9e87b9151ef219c SHA-1: 19d71545f4ed202e344bb847bffeec95e4b7bc6c SHA-256: 7e534464b2b1d74032f805ee7b48df553fd6d58a951471a8ec40f9954ffa7c25
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/wix?keyword=bsp+pipe+thread+chart+pdf'. This URL is likely used to redirect the user to a malicious site. The PDF also exhibits characteristics of a link farm, with numerous embedded links, suggesting a spam or phishing campaign. The ML classifier strongly flagged this PDF as malicious.

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.ru/wix?keyword=bsp+pipe+thread+chart+pdf
    • https://cdn.shopify.com/s/files/1/0428/5205/7244/files/lights_retention_scale.pdf
    • https://cdn.shopify.com/s/files/1/0431/6430/3516/files/74994075866.pdf
    • https://cdn.shopify.com/s/files/1/0433/5281/7832/files/lapositafuditofi.pdf
    • https://cdn.shopify.com/s/files/1/0433/7877/0076/files/cara_pengendalian_gulma_bayam_duri.pdf
    • https://cdn.shopify.com/s/files/1/0432/2469/4942/files/xedafuxukexurigigo.pdf
    • https://static.usrfiles.com/ugd/b8c837_1279f4279e6c4c0781e816f778503051.pdf
    • https://cdn.shopify.com/s/files/1/0434/3631/0678/files/63691406693.pdf
    • https://cdn.shopify.com/s/files/1/0432/6303/3502/files/aprendizaje_cooperativo_en_educacin_fsica_fundamentos_y_aplicaciones_prcticas.pdf
    • https://cdn.shopify.com/s/files/1/0433/6808/7701/files/34947121157.pdf
    • https://cdn.shopify.com/s/files/1/0440/1430/5430/files/samsung_ativ_smart_pc_bluetooth_driver.pdf
    • https://cdn.shopify.com/s/files/1/0437/9472/7074/files/gta_v_franklin_assassination_stock_market_guide.pdf
    • https://cdn.shopify.com/s/files/1/0427/5847/1846/files/pewulibigeko.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_off00008864.bin
6fae0a4da5f30e54ccee559dae5868e1d92a5856f10238350d31b6c689b6e28c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8864 5260 bytes
font_01_sfnt_off00009a3a.bin
cb26ec6a9ebf749e00022a4aa61b0908efd3fe352f92aad4a6f3fab3f78e263f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9A3A 14596 bytes

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