Malicious PDF — malware analysis report

Static analysis result for SHA-256 956936d86cea7023…

MALICIOUS

PDF

35.4 KB Created: 2020-11-04 07:55:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 1786f8ebdd11ec9f4c33014c33bd62b1 SHA-1: 232f8ca551a5f2e65f3746c945d59bfe14c0b6cb SHA-256: 956936d86cea70232d0f1291b75dca5c2b0856d4e91f86e29446d3f49c5d2959
94 Risk Score

Malware Insights

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

The PDF contains a link to known malicious redirector infrastructure, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The ML classifier also strongly flagged this PDF as malicious. The embedded URL, https://ttraff.ru/123?keyword=gun+mayhem+unblocked+24, is the primary indicator of malicious intent, likely leading to a phishing page or malware download.

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://ttraff.ru/123?keyword=gun+mayhem+unblocked+24 In PDF document text
    • https://cdn-cms.f-static.net/uploads/4367287/normal_5f885116241a7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402267/normal_5f935ed30709a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379601/normal_5f8eada0608ea.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410703/normal_5f93dea01d1ac.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368955/normal_5f89600cab8ba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366055/normal_5f8ff29c2578b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379616/normal_5fa1dc9d64f8e.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/6c0447d3-46b3-4dcd-a52e-094d95d2b2b5/nunuke.pdfIn PDF document text
    • https://s3.amazonaws.com/tetazino/bidadisagoruguzoniju.pdfIn PDF document text
    • https://s3.amazonaws.com/penale/mainstays_8_cube_storage_organizer_gray.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/94c73b50-2598-4406-8111-58f8a207a5b2/53086552276.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f61f7562-e375-4f52-adbf-dc18fcac72b8/tikage.pdfIn PDF document text
    • https://s3.amazonaws.com/sifawekujiki/angulos_alternos_externos_so_complementares.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/76c25857-ca77-45c1-a42a-1d052c0c4346/xerox.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d219baa3-f7b8-4e90-817c-5a11a4656df2/59913410912.pdfIn PDF document text
    • https://s3.amazonaws.com/divelikubapiwaj/battle_of_yorktown_map_activity.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_off00004d2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4D2C 5460 bytes
SHA-256: 97ccec06e5a2d2af8df073c458b14ab9d64cc110d0364ad6a7803438ed33c3aa
font_01_sfnt_off00005fab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FAB 9764 bytes
SHA-256: 1e032a32743bd88441603464c8b84e226ab5d91ff4bd0bb9c33d9951219b39ce

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