Malicious PDF — malware analysis report

Static analysis result for SHA-256 644d6692d950cc07…

MALICIOUS

PDF

49.3 KB Created: 2020-11-03 18:36:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 2982cc6bde0972a328214248d2565b5e SHA-1: 93d60bb5ddd09306fabd3d89f97118e9cb42a534 SHA-256: 644d6692d950cc077a96f7c6661f16da5d2eedd2cd9b496dd2f77f33f4019540
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.me/123?keyword=two+player+car+games+free+online In PDF document text
    • https://cdn-cms.f-static.net/uploads/4382617/normal_5f9997dc59a61.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366949/normal_5f9ac6dc78688.pdfIn PDF document text
    • https://didowivukosu.weebly.com/uploads/1/3/4/4/134470318/a843b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388833/normal_5f94d1993587a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367299/normal_5f8b963b3641b.pdfIn PDF document text
    • https://jatorogerujew.weebly.com/uploads/1/3/2/7/132710569/8c3f11ed.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388282/normal_5f906938a7d7a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/fasanag/xofepewuserev.pdfIn PDF document text
    • https://s3.amazonaws.com/nisoxow/nora_roberts_book_list.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b4bc624-5a8a-437f-bbd3-842bab61b246/55268951406.pdfIn PDF document text
    • https://s3.amazonaws.com/gofiguj/44227977987.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1f92d42b-4d9b-4a94-90bc-66dd491ee27f/92682725029.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8ee64a0a-f654-4310-9c21-f8746700895a/raxivuninerikaniwavab.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0f0db217-5dc6-49f7-9bdf-168403be978f/zebep.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/09d824b4-0316-41f3-8bc3-bf4ede4f2dfb/7394610269.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_off000083c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83C2 5476 bytes
SHA-256: 2d2193fefb027587a00f5da5b78d3e7ada8b84a9e91f153eb36d2dae54cacd53
font_01_sfnt_off00009666.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9666 9848 bytes
SHA-256: c007ec22e5f72546f3534a6e2db2fe0d7e938b7279ea7d767ba3d3ae7730d8a6