Malicious PDF — malware analysis report

Static analysis result for SHA-256 a412fcb9f571be4f…

MALICIOUS

PDF

46.5 KB Created: 2020-08-08 06:48:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4b6c01d2ac82d9f03b61f730b7a26ec0 SHA-1: 0c9d568ecc6223c3b0cc5d21bfc7c10698874077 SHA-256: a412fcb9f571be4f4be724da7a6ee78569b3753752dd6b248f0c9054b6a05ce8
120 Risk Score

Malware Insights

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

The PDF contains numerous links, with one specifically pointing to a known malicious redirector at 'https://ttraff.cc/pify?keyword=nominal+group+technique+pdf'. This suggests the document is designed to lead users to malicious content. The presence of many other PDF links, some hosted on Shopify, indicates a potential link farm or SEO poisoning tactic to distribute the malicious redirector. No scripts were extracted, limiting further analysis of the payload.

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.cc/pify?keyword=nominal+group+technique+pdf
    • http://files.northstarchapter.org/uploads/1/3/1/3/131379409/3117863.pdf
    • http://files.eaglebrooks.com/uploads/1/3/1/8/131857914/mupogudukikoz_surogosilux.pdf
    • http://files.thesewingcottageus.com/uploads/1/3/1/4/131409009/9412649.pdf
    • http://files.brockvilleconventioncentre.com/uploads/1/3/0/9/130969489/b987801a233.pdf
    • https://cdn.shopify.com/s/files/1/0434/4292/9821/files/85291360044.pdf
    • https://cdn.shopify.com/s/files/1/0453/8662/9288/files/formato_balance_general.pdf
    • https://cdn.shopify.com/s/files/1/0435/1872/2207/files/wugudolimemoxika.pdf
    • https://cdn.shopify.com/s/files/1/0430/4306/1913/files/sidafiwabosibe.pdf
    • https://cdn.shopify.com/s/files/1/0437/9472/7074/files/95658784716.pdf
    • https://cdn.shopify.com/s/files/1/0433/7437/9157/files/fuluseninewek.pdf
    • https://cdn.shopify.com/s/files/1/0441/1532/9176/files/extend_photoshop_trial_2019.pdf
    • https://cdn.shopify.com/s/files/1/0440/4976/0421/files/business_environment_class_12.pdf
    • https://cdn.shopify.com/s/files/1/0437/9521/8594/files/tilapia_production_in_the_philippines.pdf
    • https://cdn.shopify.com/s/files/1/0434/0776/9750/files/4195889477.pdf
    • https://cdn.shopify.com/s/files/1/0434/7618/9346/files/yakuza_0_real_estate_guide.pdf
    • https://cdn.shopify.com/s/files/1/0437/4583/7208/files/tikalonusijixigumasew.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_off00007823.bin
505f386d96bb0625eafb19917a5c015689a98058c06de1a9965998640a6146e0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7823 5484 bytes
font_01_sfnt_off00008a9d.bin
e8c71b9fefd59e77f31197b42a762ce97f07ba87675ca18a1d38997fb9d713dd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8A9D 10272 bytes

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