Malicious PDF — malware analysis report

Static analysis result for SHA-256 5cd1e06372cdf756…

MALICIOUS

PDF

49.6 KB Created: 2020-09-01 02:14:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9e4bea24248e6e98f9d69125026ff56b SHA-1: 689fc58d93260c83b212670e417e512be14942b6 SHA-256: 5cd1e06372cdf756b66880843d6902b4156447d4ca730cc0cf82fcdfc42d8d14
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link to a known malicious redirector, ttraff.ru, which is associated with SEO spam and potentially phishing. The document body, though heavily obfuscated, contains text related to 'Angry birds star wars ios' and the authoring application 'wkhtmltopdf', suggesting a lure to attract users. The heuristic PDF_SEO_LINK_FARM further indicates a large number of outbound links, reinforcing the spam/phishing nature of the document.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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/wix?keyword=angry+birds+star+wars++ios
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b8c837_1c000e4c12a145e98246d6fbf9937f2a.pdf
    • https://static.usrfiles.com/ugd/6c032c_a76be8ebae6546dc8564a7890c268879.pdf
    • https://static.usrfiles.com/ugd/77eba6_50f3c5139c5c4a92a2e862bf6786384c.pdf
    • https://static.usrfiles.com/ugd/b5aed9_1d495bf3fd4c41ec8093d9b6afb8b2ad.pdf
    • https://static.usrfiles.com/ugd/e2c250_9fb2b20e3be04393848dc20cd6569f46.pdf
    • https://cdn.shopify.com/s/files/1/0433/9033/7189/files/24976970591.pdf
    • https://cdn.shopify.com/s/files/1/0430/4296/3613/files/wituketabufibuf.pdf
    • https://cdn.shopify.com/s/files/1/0428/7086/6087/files/wagitorawotemefodaz.pdf
    • https://static.usrfiles.com/ugd/63d3ad_420a67fce55443d5ba27f979139bf2dd.pdf
    • https://static.usrfiles.com/ugd/b8c837_5ebbf8250bd9413c8ee89fee0159f020.pdf
    • https://static.usrfiles.com/ugd/e23fbb_dd7a9489cdf34a7fbf393b900bf33abe.pdf
    • https://static.usrfiles.com/ugd/bf0735_ff67e5d61c954736bbfd98680d4c597c.pdf
    • https://static.usrfiles.com/ugd/a64c8c_758dbca5b5d044cc95308e98147436b1.pdf
    • https://static.usrfiles.com/ugd/b8c837_70ecd7a810a944bd9e73a6ad259d29e1.pdf
    • https://static.usrfiles.com/ugd/b8c837_f1c71de0f6774347905c42513b28b317.pdf
    • https://static.usrfiles.com/ugd/455f95_c9f06bf28bbc4c6e9c34992b06c85ded.pdf
    • https://static.usrfiles.com/ugd/d54300_98058713591c484eab0692ca1620476c.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008424.bin
128d0be22ab2bfd7547e7d9ae924f78e9a19c70bc2f3b823cff7f2d20f3f1520		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8424 5284 bytes
font_01_sfnt_off00009642.bin
07a129c476eb9f6071df62f97fe2e8af430bebc8b8adc9cac12df4424f2193c8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9642 10192 bytes

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