Malicious PDF — malware analysis report

Static analysis result for SHA-256 6263f213c4222340…

MALICIOUS

PDF

42.1 KB Created: 2020-08-04 21:51:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7785d40bb2a2145e1e3af6b0d98d8f08 SHA-1: 250fa39f0eafb7ed088008f707b5161c76a39a51 SHA-256: 6263f213c4222340e2c368f599dcbd0c0bb54c4d1b9fef227d5c638c38f69557
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains numerous links, including one pointing to known malicious redirector infrastructure at `ttraff.com`. The document body, though heavily obfuscated, appears to contain the URL `https://ttraff.com/pify?keyword=bcbs+prior+authorization+form+pdf`, suggesting a lure to a phishing or malware distribution site. The ML classifier strongly flagged this PDF as malicious, and the presence of a link farm indicates an attempt to distribute content or traffic.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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.com/pify?keyword=bcbs+prior+authorization+form+pdf
    • http://files.desmoinesfigureskatingclub.org/uploads/1/3/0/8/130814758/rawuruwigivaxape.pdf
    • http://files.romeobacc.com/uploads/1/3/1/1/131164431/5439604.pdf
    • http://files.rebeccagoldberg.net/uploads/1/3/1/1/131164574/gosedaxegosibe.pdf
    • http://files.freehandsilversmithco.com/uploads/1/3/1/6/131606803/gejaxisugux-toxizereja-zejol.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/7367/4142/files/72720262853.pdf
    • https://cdn.shopify.com/s/files/1/0430/9866/9220/files/74264811290.pdf
    • https://cdn.shopify.com/s/files/1/0431/8402/9854/files/75578993972.pdf
    • https://cdn.shopify.com/s/files/1/0436/6660/4182/files/53044019529.pdf
    • https://cdn.shopify.com/s/files/1/0429/2139/4343/files/matrix_rotten_tomatoes.pdf
    • https://cdn.shopify.com/s/files/1/0430/4217/7181/files/18528534801.pdf
    • https://cdn.shopify.com/s/files/1/0433/0507/4838/files/83626547259.pdf
    • https://cdn.shopify.com/s/files/1/0429/1903/5033/files/57995324010.pdf
    • https://cdn.shopify.com/s/files/1/0436/3000/2336/files/nalelewaxifejonufo.pdf
    • https://cdn.shopify.com/s/files/1/0429/1638/0831/files/dowevaxowe.pdf
    • https://cdn.shopify.com/s/files/1/0430/3205/1873/files/zifodidosirobakom.pdf
    • https://cdn.shopify.com/s/files/1/0429/8866/7034/files/65109788014.pdf
    • https://cdn.shopify.com/s/files/1/0436/8292/2646/files/list_all_of_the_safe_roblox_exploits.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_off000064e1.bin
9c730ae669079892a4ad94d488f0a721156c1cfac15ff96491657996a26c3379		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64E1 5600 bytes
font_01_sfnt_off000077c0.bin
d46b6b47232cd06808ca67d34ea2a5b6c9b5345a20ebb9416ff9dbd32dcc918a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x77C0 10308 bytes

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