Malicious PDF — malware analysis report

Static analysis result for SHA-256 f4a385b19ee1035b…

MALICIOUS

PDF

43.4 KB Created: 2020-11-01 15:55:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 02300f76d7d9562f970879d4f5f0db27 SHA-1: 2c5bab960a9fe9c27a67131cba319653ff5628b0 SHA-256: f4a385b19ee1035b4e2e1027c3caefd9368ff8404555a12901a3c63a6f5f494f
94 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

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.cc/123?keyword=games+download+for+pc In PDF document text
    • https://cdn-cms.f-static.net/uploads/4376120/normal_5f8ef2b1e152a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389354/normal_5f941622efeeb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408992/normal_5f94de5d720ff.pdfIn PDF document text
    • https://vilukenuxe.weebly.com/uploads/1/3/2/8/132814007/fuvudawori.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407991/normal_5f9616a984cf9.pdfIn PDF document text
    • https://jamuseramomuf.weebly.com/uploads/1/3/1/8/131871426/dezomonuf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3771/9717/files/best_fitness_tracker_watch_android.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ecac905d-4006-4aa3-ac67-6dafeaaf955a/mimunikonixenabutuzanej.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c78da46-81b8-43b3-acb0-9fd253bef546/just_friends_billy_taylor.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/9171/2927/files/nudifier_free_download_for_android.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/7453/4552/files/asics_gel_tech_walker_neo_4_womens.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/4025/9251/files/78077734271.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_off00006be2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6BE2 5424 bytes
SHA-256: f92100db8dc5d875e64abfaf3d6f2b157cb0c6a0ffdf7d190480044068b73f68
font_01_sfnt_off00007e56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E56 10332 bytes
SHA-256: adb3871862325f39321131bcbd88a1b4d305e0e11b9aa04bce289f7858af69ae