Malicious PDF — malware analysis report

Static analysis result for SHA-256 19d9f994b4ff5e81…

MALICIOUS

PDF

38.2 KB Created: 2020-08-08 17:54:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: beec9e7cac717156e80017b466455422 SHA-1: dc4a995e986f1de75d374e8c03fdab580e67820c SHA-256: 19d9f994b4ff5e81aa95a4abf60cae216d4ed4a7436fa7ba4c8aca86627b2f38
150 Risk Score

Malware Insights

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

The PDF was flagged by multiple critical heuristics for containing malicious redirector links and a large farm of external PDF links. The primary malicious URL identified is 'https://ttraff.com/pify?keyword=basel+1+pdf', which is part of a known malicious redirector infrastructure. The document body, though heavily obfuscated, also contains this URL and numerous other links hosted on Shopify and other domains, suggesting a link farm or SEO spam campaign designed to lure users to malicious content.

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.com/pify?keyword=basel+1+pdf
    • http://files.illustrationpad.com/uploads/1/3/0/7/130775583/60d2ba971a953.pdf
    • http://files.sjuartdesign.com/uploads/1/3/1/6/131606087/wulixakitanajukaf.pdf
    • http://files.aspectsmediaimaging.com/uploads/1/3/2/6/132683014/236d6312ef701b.pdf
    • http://files.snyder-pharmacy.com/uploads/1/3/1/6/131607712/mimalopedurijixolu.pdf
    • https://cdn.shopify.com/s/files/1/0438/5941/1094/files/worlds_hardest_game_4.pdf
    • https://cdn.shopify.com/s/files/1/0434/3801/4616/files/kitchenaid_artisan_recipes.pdf
    • https://cdn.shopify.com/s/files/1/0432/3573/7764/files/daxiwazitonowe.pdf
    • https://cdn.shopify.com/s/files/1/0436/1060/3677/files/vupukex.pdf
    • https://cdn.shopify.com/s/files/1/0435/4870/4917/files/costing_and_estimation_book.pdf
    • https://cdn.shopify.com/s/files/1/0433/2558/7610/files/beechcraft_baron_58_pilot_operating_handbook.pdf
    • https://cdn.shopify.com/s/files/1/0431/6092/8405/files/pinozug.pdf
    • https://cdn.shopify.com/s/files/1/0433/7595/2030/files/popusuvudaju.pdf
    • https://cdn.shopify.com/s/files/1/0437/8243/9063/files/create_a_text_file_called_helloworld._md.pdf
    • https://cdn.shopify.com/s/files/1/0431/4365/9677/files/present_perfect_affirmative_negative_interrogative_exercises.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_off00005a52.bin
f4790a9228d816e1f0fd1f88d14e7ac281f11208f3c542c57004fb46ab16e286		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A52 5040 bytes
font_01_sfnt_off00006b94.bin
c67fe9887e9067785b5a95b084102255cc59d7be8a4123c51aa17614216e33c9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B94 9820 bytes

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