Malicious PDF — malware analysis report

Static analysis result for SHA-256 8659c9a16267349c…

MALICIOUS

PDF

38.3 KB Created: 2020-08-22 12:56:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f74ea74cd2b31c868188eacb950bea5e SHA-1: 2318730c1253a7918cd76b03f9905f4b9681c336 SHA-256: 8659c9a16267349c7588688667b52e46564ed9f6081367a5616c9f5258ae5f49
154 Risk Score

Malware Insights

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

The PDF contains embedded links that point to a known malicious redirector, ttraff.com, which is likely used to host further malicious content or phishing pages. The heuristic PDF_SEO_LINK_FARM indicates a large number of external PDF links, suggesting a link farm or SEO manipulation tactic to distribute malicious content. The ML classifier also strongly flagged this PDF as malicious.

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.com/pify?keyword=passive+voice+mixed+tenses+worksheets+pdf
    • http://files.rootzkandy.com/uploads/1/3/1/4/131453051/03b7810736691d.pdf
    • http://files.hedongreenprint.co.uk/uploads/1/3/1/3/131380767/c5cab39d57ceb2.pdf
    • http://juvusuzig.dhsbarbwire.com/uploads/1/3/1/4/131454065/9702202.pdf
    • http://files.maynewman.us/uploads/1/3/2/6/132682039/zuwip_kurugem_duramonirivuk_fovub.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/1284/0872/files/32157134174.pdf
    • https://cdn.shopify.com/s/files/1/0436/0182/1859/files/wuridexer.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/lomapatigusobotatijizu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/16946396068.pdf
    • https://cdn.shopify.com/s/files/1/0434/7848/3096/files/luves.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/78683638278.pdf
    • https://cdn.shopify.com/s/files/1/0434/6642/4470/files/69172642081.pdf
    • https://cdn.shopify.com/s/files/1/0429/6025/7177/files/2682411716.pdf
    • https://cdn.shopify.com/s/files/1/0432/8062/9913/files/busimarulogunoraxumifu.pdf
    • https://cdn.shopify.com/s/files/1/0429/6110/9148/files/influencer_marketing_campaign_guide.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/35679391278.pdf
    • https://cdn.shopify.com/s/files/1/0439/2943/6315/files/86089552179.pdf
    • https://cdn.shopify.com/s/files/1/0440/1774/6070/files/business_card_templates_publisher.pdf
    • https://cdn.shopify.com/s/files/1/0432/7519/0430/files/17798353026.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_off00005623.bin
dc6a33ee9a75f48d0fd3a62aa7ec63728e2f9d2dac17e033eecbace831cd1ae8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5623 5648 bytes
font_01_sfnt_off00006946.bin
8821a6d87b465f681f9b40017e2f2a29842f800597a084fb66798f14bb6ad1a5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6946 10128 bytes

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