Malicious PDF — malware analysis report

Static analysis result for SHA-256 246f33312a2e7db8…

MALICIOUS

PDF

38.6 KB Created: 2020-10-15 15:07:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 1663fd04853c6284c6b49ede1a3a8323 SHA-1: e36ae1e4f24499e2fbaf497a5ac77a2bcddc9380 SHA-256: 246f33312a2e7db80e7260d5457b59c60b39e9fab8ae21d1ef86c1fb68cdb381
124 Risk Score

Malware Insights

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

The PDF document contains embedded links designed to redirect users to a malicious URL, specifically 'https://cctraff.ru/strik?keyword=like+app+apk+uptodown'. This URL is identified as a known malicious redirector, suggesting the document's purpose is to funnel users to potentially harmful content. The document's structure and numerous links indicate a link farm tactic, likely to obscure the final malicious destination.

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://cctraff.ru/strik?keyword=like+app+apk+uptodown In PDF document text
    • https://cdn-cms.f-static.net/uploads/4367302/normal_5f877f1706544.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366048/normal_5f8711324bd8f.pdfIn PDF document text
    • https://site-1039488.mozfiles.com/files/1039488/xafawadamunidizusipub.pdfIn PDF document text
    • https://site-1038867.mozfiles.com/files/1038867/zijazijazi.pdfIn PDF document text
    • https://site-1043335.mozfiles.com/files/1043335/gelunesorupix.pdfIn PDF document text
    • https://site-1036775.mozfiles.com/files/1036775/67831424041.pdfIn PDF document text
    • https://site-1039814.mozfiles.com/files/1039814/nufuzubo.pdfIn PDF document text
    • https://site-1036812.mozfiles.com/files/1036812/16759301820.pdfIn PDF document text
    • https://site-1039150.mozfiles.com/files/1039150/97694887938.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366347/normal_5f87bf00996e6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365620/normal_5f8743a7a4d77.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/7bd68001-4a2d-4ace-9f97-ae7ee3f82982/xomulilupupesofara.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fee07a16-7723-4a6c-9eb2-32f025abfad8/mitupebesopokatujokusaz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/80e44774-0f6e-48d5-8ab6-ba64fe5aef22/jubefawevevigilis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/814461d9-7f7f-4e9e-b480-1d4a9a29e595/ranimijaduk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3302cc85-15c1-4c67-88fb-f021638cf57b/64348090962.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6489/2323/files/whatsapp_online_offline_notification_apk_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/6503/4902/files/wizard_of_oz_populism_worksheet_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6146/8571/files/68504867408.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2291/6520/files/jikika.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005a53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5A53 4744 bytes
SHA-256: bf3184af81b11af31b8bf2f8b1bf6b3c82976fa7e6ee1883a41305058939140b
font_01_sfnt_off00006a9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A9D 10308 bytes
SHA-256: aa72c6156d4b792642da7628314143113179a7782f4f8c8e3a189250cf7a8298

Open this report in the interactive analyzer, or submit your own file for analysis.