Malicious PDF — malware analysis report

Static analysis result for SHA-256 acc11a15d03e4de8…

MALICIOUS

PDF

57.7 KB Created: 2020-10-26 09:11:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 149908ed9995a1efd5cd7391dff92ed0 SHA-1: 178b6f3dd6a94da803024c8a1ac0490d3622cc24 SHA-256: acc11a15d03e4de83b6056d99d470879ae0d3b551f2ad978109164abef10f09a
94 Risk Score
Tags
free-cdn-ebook-manual-lure

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=inheritance+book+3+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4408858/normal_5f92ab8a98492.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366028/normal_5f8cbdd1602d2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404297/normal_5f931807906a0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374009/normal_5f92f98758314.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380083/normal_5f8d86a37d317.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368469/normal_5f8784aa51182.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382406/normal_5f8f04b5541af.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369916/normal_5f8d8c6911e6d.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/62c90704-c4b2-4184-82c6-fa495bdf6a60/rirulekutero.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/89d91203-44d6-4f0c-bb49-078c54411a57/xurivawof.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/51f11f24-df91-47b4-ab95-5695f534f316/jupewekozobamotasi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0165a6b4-f1f9-4fd7-b5ab-37ff78a5b140/dolomites_en_camping_car.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/adce3cf6-2315-448b-89de-df30cd487839/tozigikamitawipe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c7d69141-4a92-49ec-ae78-2013d5623289/gulomineki.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/14d4404a-4d49-48ce-a07e-f8486db5e216/modern_tarot_michelle_tea.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ecce1db9-c538-4804-b8bd-18bf68003be9/envision_math_grade_1_worksheets.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dc3d74f7-3f1b-4162-bbfd-2c73aebe9e36/marriage_of_heaven_and_hell_plate_3.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_off0000a2e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA2E4 5340 bytes
SHA-256: f6762a18ec3776bc4e6f4a7bcdc3f5bee90a61bdbc805a52f74d86060e97d012
font_01_sfnt_off0000b4ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB4EF 11044 bytes
SHA-256: 7c1c81ea3015e8a6a21fd56d77d9a0245d2b91659fe025adee917992c31b23c7

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