Malicious PDF — malware analysis report

Static analysis result for SHA-256 92d6a1109c296088…

MALICIOUS

PDF

42.3 KB Created: 2020-08-12 00:39:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 98c668d273dd86c63ac2757eff48f117 SHA-1: d5f723d47e26b9ead96c8feda49153c909b34b22 SHA-256: 92d6a1109c296088a440869fa4f7ed40d98a31c53911c196192c1c4535e4a915
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with one pointing to a known malicious redirector. The heuristic firings indicate this is a PDF link farm, likely used for SEO manipulation or to distribute malicious content. The primary malicious URL identified is https://ttraff.ru/wb?keyword=sustantivos%20y%20adjetivos%20en%20ingles%20pdf.

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/wb?keyword=sustantivos%20y%20adjetivos%20en%20ingles%20pdf
    • http://files.obettys.com/uploads/1/3/1/3/131381640/3eab6062aa2.pdf
    • http://zalelijew.jaclynbush.com/uploads/1/3/0/7/130738909/3383635.pdf
    • http://xekom.charlenevanbuiten.com/uploads/1/3/0/8/130813528/mozive-diporujisimo.pdf
    • http://files.naparegionaldance.com/uploads/1/3/1/6/131606876/wudabifawakinezometi.pdf
    • https://cdn.shopify.com/s/files/1/0440/4012/6614/files/80383164986.pdf
    • https://cdn.shopify.com/s/files/1/0432/6840/7464/files/color_personality_test_blue_gold_green_orange.pdf
    • https://cdn.shopify.com/s/files/1/0427/7728/0671/files/bugle_calls_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0429/8643/8807/files/vojitovufofawumoro.pdf
    • https://cdn.shopify.com/s/files/1/0429/8221/1735/files/17186974996.pdf
    • https://cdn.shopify.com/s/files/1/0435/0086/3643/files/29454331131.pdf
    • https://cdn.shopify.com/s/files/1/0431/0020/9309/files/fumefomesela.pdf
    • https://cdn.shopify.com/s/files/1/0434/3654/0069/files/melezepilefijowubi.pdf
    • https://cdn.shopify.com/s/files/1/0437/9040/1687/files/tixosomexenawufovosewe.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/buxidumex.pdf
    • https://cdn.shopify.com/s/files/1/0436/8865/7051/files/dilalilisibe.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_off0000612a.bin
202b4355cee48fb352cd2ce9e904d180930dbb9a2c398a3e2751b416c76c0989		 pdf-font-stream PDF embedded font (sfnt) at offset 0x612A 5456 bytes
font_01_sfnt_off000073e1.bin
b45d1d2123a005de418dbf30a76ab47bb29c86ecd1de40eda3c47040ef0d5e9e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73E1 12240 bytes

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