Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac6f5bd04450c8e7…

MALICIOUS

PDF

43.6 KB Created: 2020-08-26 22:39:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 527db87e6ef7a1027b460e1405b7d040 SHA-1: 53eb8d5b9639a1283b0189424deff1a2346c10e7 SHA-256: ac6f5bd04450c8e7df3ffd6b8bb6d631959ee53fdc0045b04b5d5dbb36a80fea
120 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.ru'. The document body, though heavily obfuscated, contains text that appears to be a lure for 'Nike brand guidelines' and includes the malicious URL. Additionally, the PDF contains a large number of embedded links, many of which point to Shopify domains, suggesting a link farm or SEO manipulation tactic to obscure the malicious redirector. No scripts were extracted from this sample.

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=nike+brand+guidelines
    • http://files.parknknit.com/uploads/1/3/0/8/130873838/sinesumuxasomobuxof.pdf
    • http://files.florencejoelle.com/uploads/1/3/1/4/131453302/buduluxafu_xefizivemavo_kumeredudavel_fetegeg.pdf
    • http://dexawewin.adriancarper.com/uploads/1/3/1/8/131856907/7124497.pdf
    • http://files.lindaqphotography.com/uploads/1/3/0/8/130814636/571235.pdf
    • https://cdn.shopify.com/s/files/1/0433/9567/8359/files/acercate_a_la_quimica_larousse.pdf
    • https://cdn.shopify.com/s/files/1/0431/4578/9606/files/wordly_wise_book_12_lesson_5_answers.pdf
    • https://cdn.shopify.com/s/files/1/0448/0453/8528/files/aeropostale_printable_application.pdf
    • https://cdn.shopify.com/s/files/1/0429/3446/8774/files/bekunedofotupor.pdf
    • https://cdn.shopify.com/s/files/1/0431/2963/4970/files/abstract_algebra_definition.pdf
    • https://cdn.shopify.com/s/files/1/0437/5671/6183/files/55003898683.pdf
    • https://cdn.shopify.com/s/files/1/0437/5625/7441/files/72132905481.pdf
    • https://cdn.shopify.com/s/files/1/0440/6693/0840/files/52480698559.pdf
    • https://cdn.shopify.com/s/files/1/0433/0386/2440/files/89393082812.pdf
    • https://cdn.shopify.com/s/files/1/0434/6360/6437/files/ketukigalanif.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_off00006c80.bin
8dc4c692894139bd2492b591b4e110a077e63cd216ffc738f7e96470efba19ea		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C80 5168 bytes
font_01_sfnt_off00007e12.bin
10e88ab462b9f6437bc33fb9d811c0eb49adf6bd47f8ee127311e342c85dc606		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E12 10564 bytes

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