Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ff52d7e129c20c5…

MALICIOUS

PDF

38.0 KB Created: 2020-11-04 21:27:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: a363a17188e7317b394d9ddcce9d552a SHA-1: e5fc0e45f337863a1f99001619a203c7cd9bf497 SHA-256: 2ff52d7e129c20c506f534be5615159c7246b7f2ff47e11fedd4a45b5da240bf
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 'gettraff.ru'. The document body, though heavily obfuscated, contains text related to 'unblocked games' and the malicious URL, suggesting a social engineering lure. The ML classifier also strongly flagged this PDF as malicious.

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/123?keyword=unblocked+games+happy+wheels In PDF document text
    • https://cdn-cms.f-static.net/uploads/4403685/normal_5fa2a1368a25b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369930/normal_5f8ab619c2511.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368962/normal_5f9ae39438c14.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447487/normal_5fa2b399ae7f8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366995/normal_5f8a56dcdd7c4.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/8dc5093f-de67-4710-bd0f-714489f7d2dc/job_interview_questions_and_sample_answers_uk.pdfIn PDF document text
    • https://s3.amazonaws.com/rutojo/carlyle_lake_weather_and_wind.pdfIn PDF document text
    • https://s3.amazonaws.com/wenobagupexekap/wokokegufadivabowavud.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b5fc71e5-6929-4df1-8211-e2b0987aa0bf/movieruzp_com_telugu_2019.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/adbee73c-1b32-4af2-ae31-d82d990cd16e/31204642301.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/71d75e50-4aac-45f3-bd74-8fdb177d975c/19691210939.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/53ff3bd2-f44f-4891-b96a-d655a53478cc/nbme_step_3_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/watajive/gazi_tv_live_today_bpl_2019.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_off0000561f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x561F 5780 bytes
SHA-256: 670b104748106d363dfce6f20cbd4402ff83fc8e29385a4583ffc77249d7ec6b
font_01_sfnt_off000069b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x69B7 10680 bytes
SHA-256: 91a6eb6bfb2b4e3e233ccb8b6dd9d74f207fc951e2ed1e2afd9e21b57879bd76