Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d368ac023b89ae0…

MALICIOUS

PDF

41.3 KB Created: 2020-11-05 03:40:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 40902293e5b2bfff796183bcd7797c00 SHA-1: 124f60f6e67c6e72f38db35f49f12b9993ca740c SHA-256: 9d368ac023b89ae07cd3042be43b98018173a86d335ec964a8e65379b22af796
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.com/123?keyword=coco+chanel+earrings+fake In PDF document text
    • https://cdn-cms.f-static.net/uploads/4380522/normal_5f93e877e820a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375518/normal_5f8e0b9e8ee3d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413109/normal_5fa344dcd6d14.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418747/normal_5fa07552be8ed.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372681/normal_5f89b7ce54cb6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387056/normal_5f8fddc1119e8.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/08499081-9935-4a8a-b1b5-63c89a7956fd/50856791421.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cad9c4e1-c80b-42a3-8e5b-fa5af6a9e736/oni_coal_generator.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3ac9d6fa-ba43-4862-93a5-1baa23d9606a/73350455603.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8e0e0893-732c-4a3b-b73a-9a0cca0f9584/wefewizatofejabasofexe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b1aad92b-d5f1-47bf-a709-d42ce6a5e75a/jojal.pdfIn PDF document text
    • https://s3.amazonaws.com/gupawupigawono/60467944255.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/56f24c3c-6e76-488c-863a-a62d8d49f8c4/jegobibozanovile.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_off0000640d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x640D 5112 bytes
SHA-256: f88bf8ddda91558d6ac9ec46d0cbad1cc29ed89353b7f94e8b9810d5149bbeb1
font_01_sfnt_off0000756f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x756F 10344 bytes
SHA-256: 08f7cc755790d3112dd2a0129965442d2874651deec770b35226606f53a5b095