Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d9ea059403dc809…

MALICIOUS

PDF

37.4 KB Created: 2020-08-07 02:20:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0097575f113b7dd4247889ac5c099454 SHA-1: c29848d66d511817569c07d3cc105807777ed139 SHA-256: 5d9ea059403dc809650ef3193152795f8c027dd85ab109b2a5da5c6244133a1c
162 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. Additionally, it exhibits characteristics of a PDF link farm, with numerous external links, many hosted on Shopify. The ML classifier strongly flagged this PDF as malicious. While no scripts were extracted, the presence of a malicious redirector and a link farm suggests an attempt to direct users to malicious content, likely for phishing or malware distribution.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=encyclopedia+brown+gets+his+man+pdf
    • http://files.burmusik.com/uploads/1/3/0/7/130739697/zawogu-zazenakiwuxux.pdf
    • http://files.balancedpets.ca/uploads/1/3/1/0/131071166/zowilazefibalafa.pdf
    • http://balazu.oldsageapothecarians.com/uploads/1/3/1/6/131636725/fabenozupi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/9624/3364/files/99446035430.pdf
    • https://cdn.shopify.com/s/files/1/0429/8267/0485/files/70704552478.pdf
    • https://cdn.shopify.com/s/files/1/0429/3260/0985/files/46807208892.pdf
    • https://cdn.shopify.com/s/files/1/0432/3485/3021/files/33777013973.pdf
    • https://cdn.shopify.com/s/files/1/0434/9722/6402/files/rebem.pdf
    • https://cdn.shopify.com/s/files/1/0434/2389/1618/files/bsc_agri_biotechnology_syllabus.pdf
    • https://cdn.shopify.com/s/files/1/0430/7753/3856/files/wajesotulawalanodudo.pdf
    • https://cdn.shopify.com/s/files/1/0434/3624/5142/files/suxogora.pdf
    • https://cdn.shopify.com/s/files/1/0431/8153/9483/files/16634522590.pdf
    • https://cdn.shopify.com/s/files/1/0439/1829/5195/files/5076067230.pdf
    • https://cdn.shopify.com/s/files/1/0440/1017/6662/files/susakexidupebe.pdf
    • https://cdn.shopify.com/s/files/1/0440/1712/3493/files/jikapagafuv.pdf
    • https://cdn.shopify.com/s/files/1/0428/5284/3676/files/battle_fiend_persona_5.pdf
    • https://cdn.shopify.com/s/files/1/0433/0097/8853/files/16833006225.pdf
    • https://cdn.shopify.com/s/files/1/0432/9888/1704/files/93830846014.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_off00005225.bin
07e0f7527baa4da49a7d4ff01c5e5428ee4ca8bd738a98d748a7aed4dd881f52		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5225 5860 bytes
font_01_sfnt_off00006607.bin
fdf7810c298aef8904cd043608e2c0e54ab1051d3baf8c8f77c090fea51067f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6607 10048 bytes

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