Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f2216a1a5a6ff0f…

MALICIOUS

PDF

42.8 KB Created: 2020-10-14 18:19:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7c517441413f9318305478c6a9b88d37 SHA-1: 7ef9de90591938aeb32e2e24772ac937e5925a36 SHA-256: 4f2216a1a5a6ff0f58d0cdfb12f7890363935e745c8890b6bb818ce72d35e645
94 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing indicating a malicious redirector link. The ML classifier also strongly flagged this PDF as malicious. The embedded URL points to a known malicious redirector, suggesting an attempt to lure the user to a harmful site, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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://gettraff.ru/strik?keyword=mots+crois%25C3%25A9s+ce1+vocabulaire+pdf
    • https://site-1039313.mozfiles.com/files/1039313/wuvilegawigodo.pdf
    • https://site-1043791.mozfiles.com/files/1043791/wiberofesakalozexopu.pdf
    • https://site-1048448.mozfiles.com/files/1048448/47504529059.pdf
    • https://site-1045368.mozfiles.com/files/1045368/88620948912.pdf
    • https://site-1038946.mozfiles.com/files/1038946/48974329576.pdf
    • https://cdn-cms.f-static.net/uploads/4365606/normal_5f86fcef2268f.pdf
    • https://cdn-cms.f-static.net/uploads/4366022/normal_5f87092dd09ec.pdf
    • https://cdn-cms.f-static.net/uploads/4365607/normal_5f86fac7b98a8.pdf
    • https://cdn-cms.f-static.net/uploads/4366008/normal_5f8704e98cd11.pdf
    • https://site-1043769.mozfiles.com/files/1043769/27436302022.pdf
    • https://site-1043855.mozfiles.com/files/1043855/tarubokivipugowuzi.pdf
    • https://site-1041939.mozfiles.com/files/1041939/23029406285.pdf
    • https://site-1038508.mozfiles.com/files/1038508/woruradetibajilukudetase.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0479/3588/1372/files/kegasotugigajopeti.pdf
    • https://cdn.shopify.com/s/files/1/0496/5607/0295/files/nefezanavidoruxurusal.pdf
    • https://cdn.shopify.com/s/files/1/0483/9407/6312/files/taco_bell_nutrition_calc.pdf
    • https://uploads.strikinglycdn.com/files/ca545bec-9eb8-4b27-a271-8f40c3f941db/dozazofipotiki.pdf
    • https://uploads.strikinglycdn.com/files/2033ca13-73c8-42eb-ac29-4c9c25911716/xujuzunuvubufejopemomudi.pdf
    • https://uploads.strikinglycdn.com/files/154806cd-1b27-4d62-b080-56e367b7960e/minafalelesixugerog.pdf
    • https://uploads.strikinglycdn.com/files/60f41d42-1236-4eb0-910f-b4c23773b60c/vubajedotije.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_off00004e32.bin
66ba945d6735002f09d2ddfc05b59a0f1473b24341412ec66c20286df87aca48		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4E32 5324 bytes
font_01_sfnt_off00006026.bin
acf44fa0d41cd40278e5b173f3613d625349d835da6ae6821bf3735e3469d8d9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6026 14888 bytes
font_02_sfnt_off00008d5e.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8D5E 4324 bytes

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