Malicious PDF — malware analysis report

Static analysis result for SHA-256 c694a41ee648314e…

MALICIOUS

PDF

33.2 KB Created: 2020-09-01 14:17:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: aac915a782a62175209bb49d362346bc SHA-1: 39e692e6a2e6bd1e2bd24b33ee95d1e15b077aad SHA-256: c694a41ee648314e47a4ea8c2f1f823a4d2e4e6665b9969427b52e76a9f3eacd
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.me/wix?keyword=marked+safe+meme+template'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs. The ML classifier also strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains the same malicious URL and references to meme templates, suggesting a lure.

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.me/wix?keyword=marked+safe+meme+template
    • https://static.usrfiles.com/ugd/9e14ca_5607051d36dd4d429bb9f427afb5817d.pdf
    • https://static.usrfiles.com/ugd/0bcf16_0072486ac7c141fda855d32d2a16ae65.pdf
    • https://static.usrfiles.com/ugd/d3758e_e1f946b627114b4b9a12955ca410b209.pdf
    • https://cdn.shopify.com/s/files/1/0434/0639/3496/files/nukalovefunojod.pdf
    • https://cdn.shopify.com/s/files/1/0437/0094/5048/files/broca_and_wernicke_area.pdf
    • https://cdn.shopify.com/s/files/1/0430/1045/7753/files/finance_interview_questions_and_answers_for_freshers.pdf
    • https://static.usrfiles.com/ugd/b8c837_64e5bb49698a4c9bad2780874bc10da0.pdf
    • https://static.usrfiles.com/ugd/f09a9d_34263d7cc6ed480fa24583b830b1933d.pdf
    • https://cdn.shopify.com/s/files/1/0435/9690/6659/files/tekejujejisileb.pdf
    • https://cdn.shopify.com/s/files/1/0433/4498/6280/files/algebra_1_regents_test.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_off000043a0.bin
7e8650c38e9a2f26b8a35e99ba79f88248ec194704dbc74eddfff70639d5872f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x43A0 5256 bytes
font_01_sfnt_off0000557b.bin
c457315cc5a70faf8905a6d4344d32c8f8572673dc4bb608dec8e69edc56822f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x557B 10228 bytes

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