Malicious PDF — malware analysis report

Static analysis result for SHA-256 11d4c734285c4d1a…

MALICIOUS

PDF

41.7 KB Created: 2020-11-03 18:04:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: e4bb70d8155c57c9f9071afcb73df4db SHA-1: 25650da8ab565ae7b1698f3435e28b081f5b9b27 SHA-256: 11d4c734285c4d1a7caf2340cc8e2ea090f34713ec07b1e4d292422efdea19c2
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://ggtraff.ru/strik?keyword=spongebob+squarepants+youku In PDF document text
    • https://cdn-cms.f-static.net/uploads/4369141/normal_5f8f455f8ddf1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366630/normal_5f886b44d3cc6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387931/normal_5f9a344edaa80.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390097/normal_5f9d1bcc0fa67.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382186/normal_5f9b8b63a5634.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366022/normal_5f87030955d1d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380395/normal_5f9058474ce9b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381543/normal_5f8dc76e060c0.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/516f082f-c45e-42fb-8298-81cdfb025e02/muwisiroguzanolotunada.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c83d2fc4-2f83-4d35-b27a-cfb3ec7145e9/bared_to_you_free.pdfIn PDF document text
    • https://s3.amazonaws.com/bivanud/pufavuwasugabejebafalalu.pdfIn PDF document text
    • https://s3.amazonaws.com/pesetufavo/fufegarok.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f7e3fdb2-ac5a-49e1-afc0-6eb09a70f26a/guvewaratomuful.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/240e5801-3acc-4cbe-b3f9-e09e9af4f24b/rozapoweg.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_off000063d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63D1 5488 bytes
SHA-256: 56869accff8a2e6039c70f29ecc94e9f1d8fd9d2a236efb3e8b398caa26c487f
font_01_sfnt_off00007697.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7697 10436 bytes
SHA-256: 7e95f65e1f6cbe71cf990fa221e92d8f6ab330cbd7114d91b6281e2d43766fc7