Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2b81f2021d05402…

MALICIOUS

PDF

36.9 KB Created: 2020-08-24 16:16:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c1dd2152b19e72529003299adb349926 SHA-1: 22095c338854d0782ddc17e6c5c869c626782b41 SHA-256: d2b81f2021d0540248c1c177428e4c105ec0fcb3021cf20e1d6b56d99e02928c
150 Risk Score

Malware Insights

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

This PDF file contains a link farm designed to redirect users to malicious infrastructure. The primary malicious URL identified is https://ttraff.ru/pify?keyword=aids+stands+full+form, which is flagged as a malicious redirector. The document body, though heavily obfuscated, contains references to the topic 'Aids stands full form' and the PDF creation tool, suggesting a lure to a potentially harmful external resource. The presence of numerous other PDF links, many hosted on Shopify, indicates a link farm strategy to obscure the ultimate destination.

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=aids+stands+full+form
    • http://mugena.suttoncommunitycouncil.com/uploads/1/3/1/3/131379866/6999706.pdf
    • http://files.sundancecrow.com/uploads/1/3/1/3/131380288/00eb0ecb63.pdf
    • http://mozebanav.oregonarchaeologists.com/uploads/1/3/0/7/130775982/9212110.pdf
    • http://files.quapawcattlecompanystore.com/uploads/1/3/1/4/131453267/8f4c36196.pdf
    • https://cdn.shopify.com/s/files/1/0431/3966/1981/files/wezawakikarakuz.pdf
    • https://cdn.shopify.com/s/files/1/0431/8609/4241/files/ignou_m._a_assignment_front_page.pdf
    • https://cdn.shopify.com/s/files/1/0430/5226/9717/files/puvutukigurenen.pdf
    • https://cdn.shopify.com/s/files/1/0435/5765/0584/files/flatten_array_javascript.pdf
    • https://cdn.shopify.com/s/files/1/0428/3128/2335/files/active_and_passive_voice_quiz_for_grade_8.pdf
    • https://cdn.shopify.com/s/files/1/0428/5975/7734/files/lakijifopubuxezu.pdf
    • https://cdn.shopify.com/s/files/1/0428/7417/5644/files/pavizokikejan.pdf
    • https://cdn.shopify.com/s/files/1/0447/4336/0663/files/65974289242.pdf
    • https://cdn.shopify.com/s/files/1/0437/7870/3511/files/xexofawije.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_off0000540c.bin
ea648fb384a24f40a9d487cb460c952500c10e3feba39af9c1456e36b674c03e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x540C 5040 bytes
font_01_sfnt_off00006512.bin
ebcb894809a844c76e46ccf00d8aad8f55bd5c185b6adb808844ff159d01d201		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6512 10076 bytes

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