Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d2fb8c1dcd899c7…

MALICIOUS

PDF

46.3 KB Created: 2020-11-04 17:49:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6725db141e10b5ae9d7ddbff4617ee1f SHA-1: 5bee4b06758f8690111456d10a605252ec63e2d7 SHA-256: 2d2fb8c1dcd899c72c03f76eac46da241c389ed18054af7633ac25de9997511d
94 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.me/123?keyword=vietnam+war+effects+on+economy'. The ML classifier also strongly flagged this PDF as malicious. While no scripts were extracted, the presence of a malicious URL within the document body indicates an attempt to lure the user to a harmful site, likely as part of a phishing or malware delivery scheme.

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.me/123?keyword=vietnam+war+effects+on+economy
    • https://cdn-cms.f-static.net/uploads/4373985/normal_5f8cebe6d9e3c.pdf
    • https://cdn-cms.f-static.net/uploads/4385020/normal_5f8f50a7b02cc.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/1000ad44-ac6b-49ef-a472-df0b5c73ea86/7530337181.pdf
    • https://uploads.strikinglycdn.com/files/a1a8c889-56f7-41fb-9edd-d5231f829bb0/umber_hulk_dnd.pdf
    • https://uploads.strikinglycdn.com/files/044fe470-2e1a-468e-8bb1-166bac387364/83184800458.pdf
    • https://uploads.strikinglycdn.com/files/497b1488-b822-475a-84ce-5e2d71f23f29/runumoli.pdf
    • https://uploads.strikinglycdn.com/files/6e7e9028-f9f1-49c8-ab71-b9c32a1cd9e9/24309412487.pdf
    • https://uploads.strikinglycdn.com/files/8f01eb70-314c-4b51-9ff6-6a9ef6882a82/bagomazo.pdf
    • https://uploads.strikinglycdn.com/files/ed27112b-f986-493c-9e55-813ddfc507e3/bass_notes_chart_piano.pdf
    • https://uploads.strikinglycdn.com/files/b9152893-7f13-4aa9-b974-97260799970e/pageant_interview_questions_and_answers.pdf
    • https://uploads.strikinglycdn.com/files/92c95f88-6cdd-4b1c-88e4-a79719905a85/farotepabojusefiworadugok.pdf
    • https://uploads.strikinglycdn.com/files/9c00d7d1-5274-4621-8040-c7f78367ff86/wosuzelumijavetof.pdf
    • https://uploads.strikinglycdn.com/files/6ce9b2a2-07f9-4e12-b0fb-8f2fa8e10d28/frp_fastboot_tool_download.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_off000077c5.bin
3c3477ec96c00240603b63092ceb7e7639b740618c760216e7937a096f7b4200
pdf-font-stream PDF embedded font (sfnt) at offset 0x77C5 5156 bytes
font_01_sfnt_off00008956.bin
0c749a238040acc093a05bae9870070b8fcdb762995d665a2001b4177b689808
pdf-font-stream PDF embedded font (sfnt) at offset 0x8956 10368 bytes