Malicious PDF — malware analysis report

Static analysis result for SHA-256 f4e8a937fda4b239…

MALICIOUS

PDF

41.6 KB Created: 2020-08-18 17:57:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8e23a40f7935a179bbf8813bed516889 SHA-1: e497dda7adc47e06398352de4ba96ad1ff47005e SHA-256: f4e8a937fda4b2396e4f30fc48bd047c43b050f9758272bb7196e4b8b60c2c71
120 Risk Score

Malware Insights

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

The PDF contains a mass of external links, many hosted on Shopify, designed to appear as legitimate documents. One prominent link, 'https://ttraff.ru/pify?keyword=bernette+340+deco+file+format', leads to a known malicious redirector. The document body, though heavily obfuscated, contains this malicious URL and other benign-looking URLs, suggesting a link farm or SEO poisoning tactic to drive traffic to malicious infrastructure.

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/pify?keyword=bernette+340+deco+file+format
    • http://dovif.leluxhomescents.com/uploads/1/3/2/7/132712354/321a8.pdf
    • http://files.tewksburybaptists.org/uploads/1/3/2/7/132711975/22d93687114.pdf
    • https://cdn.shopify.com/s/files/1/0428/3462/4679/files/lesukokivinoxolar.pdf
    • https://cdn.shopify.com/s/files/1/0434/3313/2193/files/zavojonukorux.pdf
    • https://cdn.shopify.com/s/files/1/0433/1870/6341/files/47045902914.pdf
    • https://cdn.shopify.com/s/files/1/0440/2449/6286/files/assembly_language_programming_8086_examples.pdf
    • https://cdn.shopify.com/s/files/1/0431/6102/6719/files/komerevinal.pdf
    • https://cdn.shopify.com/s/files/1/0435/6082/9087/files/dmv_nj_practice_test_500_questions.pdf
    • https://cdn.shopify.com/s/files/1/0432/1096/5147/files/torujanadusubarasojulul.pdf
    • https://cdn.shopify.com/s/files/1/0440/7210/8197/files/10994391434.pdf
    • https://cdn.shopify.com/s/files/1/0429/0006/2367/files/gatiwakitabibajenotifujal.pdf
    • https://cdn.shopify.com/s/files/1/0438/3234/4736/files/bootstrap_shopping_template.pdf
    • https://cdn.shopify.com/s/files/1/0440/7921/8838/files/insect_encyclopedia_with_pictures.pdf
    • https://cdn.shopify.com/s/files/1/0435/4326/5434/files/65546264482.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_off00006380.bin
c394bdb2d9e260a0738356d696afa75bd1b39db1c045b68b519f4488ee0658d8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6380 5432 bytes
font_01_sfnt_off000075ea.bin
65f7e6c08671fd127a9a11899769ee80886f3dc4fa9b0281d2b1bd6810da2926		 pdf-font-stream PDF embedded font (sfnt) at offset 0x75EA 10428 bytes

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