Malicious PDF — malware analysis report

Static analysis result for SHA-256 883ace82317930ab…

MALICIOUS

PDF

47.9 KB Created: 2020-08-12 23:44:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a9c91745dc9e03c081c448880d8356ba SHA-1: 312791c3732814fb48e6e54a0a4ff208fec9d8c2 SHA-256: 883ace82317930abb2aeb9884606fb47b086112ccd01923083d08b7c8fdcc7f0
150 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, pointing to `https://ttraff.ru/pify?keyword=aniline+yellow+dye+pdf`. Additionally, it features a large number of embedded links, many pointing to Shopify domains, suggesting a link farm or SEO poisoning tactic. The document body contains the malicious URL and a benign-looking filename, likely intended to trick users into clicking the malicious link.

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/pify?keyword=aniline+yellow+dye+pdf
    • http://files.drjoffee.com/uploads/1/3/1/6/131606208/lidumisuvitinan-tekofiliwor.pdf
    • http://jijilofe.asheford.com/uploads/1/3/1/3/131379179/2098618.pdf
    • http://kiwabo.lisadonaldson.com.au/uploads/1/3/1/4/131438641/d4faac8bfa0fbd1.pdf
    • http://files.accruemineralsinc.com/uploads/1/3/1/3/131398231/divanuli-pureketebaxi-tafejaku-xobul.pdf
    • http://files.worldsnowmobilehq.com/uploads/1/3/1/4/131453623/3131080.pdf
    • https://cdn.shopify.com/s/files/1/0433/9014/0583/files/advanced_excel_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0438/4745/0789/files/sekofipasosekutizefoga.pdf
    • https://cdn.shopify.com/s/files/1/0437/1791/8870/files/giduzefexoxerurejaviji.pdf
    • https://cdn.shopify.com/s/files/1/0431/5742/2229/files/55373078311.pdf
    • https://cdn.shopify.com/s/files/1/0430/5905/2706/files/97307774531.pdf
    • https://cdn.shopify.com/s/files/1/0448/4333/5837/files/entrepreneurship_course_description.pdf
    • https://cdn.shopify.com/s/files/1/0431/3881/0023/files/43761923661.pdf
    • https://cdn.shopify.com/s/files/1/0430/4040/7701/files/gigugapuregosutexe.pdf
    • https://cdn.shopify.com/s/files/1/0439/7904/7070/files/55008919178.pdf
    • https://cdn.shopify.com/s/files/1/0451/6475/7146/files/wukalu.pdf
    • https://cdn.shopify.com/s/files/1/0433/5733/9816/files/kamaxa.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_off00007b7d.bin
c946b26f9b9dcd9488e3a2cb710b023f10435160228d0ac19266acda6bfa0014		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B7D 4736 bytes
font_01_sfnt_off00008bc8.bin
7b257cec174dccf472eef77ebd05362a23bbbe3e27fd028254c450f1a4bc63b1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8BC8 11360 bytes

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