Malicious PDF — malware analysis report

Static analysis result for SHA-256 0564f1384f1a6e50…

MALICIOUS

PDF

41.9 KB Created: 2020-08-09 21:47:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ecf1ace6d91ca9e3cbca35f042c457fc SHA-1: da28a074b99e86515ed2ff0831abd35806f0b3ed SHA-256: 0564f1384f1a6e5036a004ad6f84a5fa585cbee2ecd6cf266889a163dada24ee
154 Risk Score

Malware Insights

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

This PDF file contains a link farm designed to redirect users to malicious infrastructure, specifically identified by the URL https://ttraff.ru/pify?keyword=test+bulats+anglais+pdf. The document body is heavily obfuscated, but the presence of numerous links to external PDF files, many hosted on Shopify, suggests an attempt to disguise malicious activity within a seemingly legitimate document structure. The ML classifier strongly indicated maliciousness, supporting the assessment of a phishing or redirection attack.

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=test+bulats+anglais+pdf
    • http://files.huronmarketing.com/uploads/1/3/0/9/130969645/wigaras.pdf
    • http://xexux.ishootuk.com/uploads/1/3/2/6/132682883/2220323.pdf
    • http://files.signaturegames.eu/uploads/1/3/1/4/131409709/ziguku_tubufaliz.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0434/8782/1984/files/39786854544.pdf
    • https://cdn.shopify.com/s/files/1/0436/9140/9561/files/teddy_pendergrass_torrents.pdf
    • https://cdn.shopify.com/s/files/1/0432/4923/8179/files/46152657830.pdf
    • https://cdn.shopify.com/s/files/1/0430/8320/2711/files/83236965889.pdf
    • https://cdn.shopify.com/s/files/1/0448/0778/2557/files/mastering_physics_answers_key.pdf
    • https://cdn.shopify.com/s/files/1/0445/4160/8100/files/industrial_wastewater_treatment_methods.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/97897646990.pdf
    • https://cdn.shopify.com/s/files/1/0434/7117/5832/files/xixikagizuboriwanifil.pdf
    • https://cdn.shopify.com/s/files/1/0436/8036/6745/files/how_to_move_pages_in_adobe_acrobat_pro.pdf
    • https://cdn.shopify.com/s/files/1/0432/3953/8851/files/30955856735.pdf
    • https://cdn.shopify.com/s/files/1/0431/5129/4619/files/9991302640.pdf
    • https://cdn.shopify.com/s/files/1/0429/5009/9107/files/16867794137.pdf
    • https://cdn.shopify.com/s/files/1/0434/3152/6557/files/44626595282.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_off0000597b.bin
a80a0ae8a386c32f56169d5a737805a44361b6818dfd6849d8ef82ad7c264c2a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x597B 4976 bytes
font_01_sfnt_off00006a6d.bin
b535145f4187f5937e644221ad594a6cb87e9946851287203a82399272cb1fab		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A6D 10088 bytes
font_02_sfnt_off00008cee.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8CEE 4324 bytes

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