Malicious PDF — malware analysis report

Static analysis result for SHA-256 168049c88b5f359d…

MALICIOUS

PDF

42.7 KB Created: 2020-08-16 20:40:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5c802a17916a1b58e62885aea36966c3 SHA-1: 220eb735c5e9bb25fa5c3649a03260c2c15c6263 SHA-256: 168049c88b5f359d707b1d53c792fab84ee0902f88b5ea8c7c26844a5f96e026
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a heuristic firing indicating it links to known malicious redirector infrastructure, specifically `https://ttraff.ru/pify?keyword=turn+off+adaptive+icons+android`. Additionally, the PDF exhibits characteristics of a link farm, containing numerous links to other PDFs hosted on Shopify and other domains. The document body, though heavily obfuscated, also contains the malicious URL, suggesting a lure to external content.

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=turn+off+adaptive+icons+android
    • http://weban.stepintoyourjoy.com/uploads/1/3/1/6/131607163/6d486.pdf
    • http://mobilo.yazdab.com/uploads/1/3/1/1/131164250/d14db.pdf
    • http://files.greentarafarm.com/uploads/1/3/2/7/132740296/11a18c42a79a6d1.pdf
    • http://gobatiso.rockfishgrovefwbchurch.com/uploads/1/3/1/8/131856333/tegotovo_jibotajub_zumelatibuxo.pdf
    • http://files.pickygrouchynon-cook.com/uploads/1/3/1/3/131398184/4358038.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/0201/9487/files/29929103760.pdf
    • https://cdn.shopify.com/s/files/1/0437/2103/1832/files/romafeka.pdf
    • https://cdn.shopify.com/s/files/1/0434/6108/3288/files/nixurilugefij.pdf
    • https://cdn.shopify.com/s/files/1/0434/2674/2421/files/82728632734.pdf
    • https://cdn.shopify.com/s/files/1/0440/7525/3910/files/abstract_reasoning_questions_and_answers_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0436/3547/4590/files/6763400636.pdf
    • https://cdn.shopify.com/s/files/1/0427/3196/2535/files/fmcsa_hours_of_service.pdf
    • https://cdn.shopify.com/s/files/1/0434/5089/2454/files/solidworks_tutorials.pdf
    • https://cdn.shopify.com/s/files/1/0436/5965/7374/files/risadupuvelamuwesujeza.pdf
    • https://cdn.shopify.com/s/files/1/0430/3552/5282/files/basics_of_computer_applications.pdf
    • https://cdn.shopify.com/s/files/1/0440/7099/4085/files/lojidunogizip.pdf
    • https://cdn.shopify.com/s/files/1/0431/7632/9373/files/sovoziboru.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_off000069c0.bin
4a06b6bfba27ecd52ab5acaa1ea5eda612ea0aa3b4e598c6406b13481e2b4a97		 pdf-font-stream PDF embedded font (sfnt) at offset 0x69C0 5128 bytes
font_01_sfnt_off00007b48.bin
2dcd290ba66e2533588db8028797067ab099e7428da6791e497d1b9b300530a7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B48 10204 bytes

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