Malicious PDF — malware analysis report

Static analysis result for SHA-256 7556dfc807d2ce46…

MALICIOUS

PDF

50.5 KB Created: 2020-08-21 21:49:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: becc8f3c3d4e8478ef370fcfb418b9b6 SHA-1: 8ddfe86068e9d8dd4c03eaf38d2cc2c83e618699 SHA-256: 7556dfc807d2ce46c9c31f86ebf484eb71224e660addae269afe85e26c6459a7
154 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for linking to known malicious redirector infrastructure, specifically pointing to 'ttraff.ru'. The document body, though heavily obfuscated, also contains this URL and numerous other links to Shopify-hosted PDFs, suggesting a link farm or SEO poisoning attempt. The primary malicious URL is 'https://ttraff.ru/pify?keyword=kingdom+hearts+fragmentary+passage+guide', which is likely used to redirect users to a malicious site.

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/pify?keyword=kingdom+hearts+fragmentary+passage+guide
    • http://files.victoriakeithcakes.com/uploads/1/3/0/7/130776055/murekafuvadumovomaze.pdf
    • http://files.kimwattspsychic.com/uploads/1/3/0/7/130739524/7383084.pdf
    • http://duvexo.belfordcashmere.com/uploads/1/3/2/6/132681556/manosixewa.pdf
    • http://files.trustmarkroofing.com/uploads/1/3/1/6/131606965/jikerurule.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/7832/8221/files/41977276283.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nuruge.pdf
    • https://cdn.shopify.com/s/files/1/0430/5597/2506/files/free_kalimba_tabs.pdf
    • https://cdn.shopify.com/s/files/1/0429/4197/2646/files/60283872119.pdf
    • https://cdn.shopify.com/s/files/1/0441/1038/1208/files/bridge_to_terabithia.pdf
    • https://cdn.shopify.com/s/files/1/0435/5588/1115/files/criminal_law_cases_and_materials_7th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/94323725826.pdf
    • https://cdn.shopify.com/s/files/1/0437/2407/9254/files/criteria_cognitive_aptitude_test.pdf
    • https://cdn.shopify.com/s/files/1/0429/8620/9439/files/29637105157.pdf
    • https://cdn.shopify.com/s/files/1/0435/3540/1111/files/just_mercy_bryan_stevenson.pdf
    • https://cdn.shopify.com/s/files/1/0434/4145/5261/files/31891687396.pdf
    • https://cdn.shopify.com/s/files/1/0437/4649/2565/files/72556620795.pdf
    • https://cdn.shopify.com/s/files/1/0440/4235/4853/files/91461092536.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000689c.bin
1e6bb22a94db1e1277b657be226ef43ee7075b7662152eb154d65f6789149911		 pdf-font-stream PDF embedded font (sfnt) at offset 0x689C 6520 bytes
font_01_sfnt_off00007df4.bin
91cbbcb2fadc6660723439f1e125d7cb10837872fc16f61607dd71341f6c64bf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7DF4 5496 bytes
font_02_sfnt_off0000907a.bin
efb84af48d7ab836db2aab6e2449b209be3bcb343b2f280fb17a6aea4c496bff		 pdf-font-stream PDF embedded font (sfnt) at offset 0x907A 13688 bytes

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