Malicious PDF — malware analysis report

Static analysis result for SHA-256 3da48d75c31f03fb…

MALICIOUS

PDF

41.5 KB Created: 2020-11-09 16:26:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 2c9e0d060b4a7068e19297afaef2ee82 SHA-1: dc3014b809817d03dd8db92e1d3872dcebbe07e2 SHA-256: 3da48d75c31f03fb73e488e61dc13bf910587b172cc3adfe416868e11ec10a6c
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://gettraff.ru/strik?keyword=most+powerful+branch+of+government+originally In PDF document text
    • https://cdn-cms.f-static.net/uploads/4413016/normal_5fa1b59190506.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407807/normal_5f95fb7d4f9ff.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372721/normal_5f897b0b003ac.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366995/normal_5f8c271348a3b.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/e525e2d3-1d01-493a-b6ea-079953cd8a18/35005668323.pdfIn PDF document text
    • https://s3.amazonaws.com/retobifulipo/69760048419.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9f9932d5-c9cf-4dbc-8aa9-b3ff92a8ed39/kid_gift_ideas_for_white_elephant.pdfIn PDF document text
    • https://s3.amazonaws.com/xazarujokemus/13355914639.pdfIn PDF document text
    • https://s3.amazonaws.com/vogubivajavofu/99686375536.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e368307-63b3-413f-88c1-e31e9a62f563/delta_science_definition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7b8c9dc3-dd2b-45ee-add6-4148faebd8b1/ecuador_vs_uruguay_2022.pdfIn PDF document text
    • https://s3.amazonaws.com/ninazarila/valley_associates_for_independent_living_inc.pdfIn PDF document text
    • https://s3.amazonaws.com/lixisariwulo/campus_tour_guide_resume.pdfIn PDF document text
    • https://s3.amazonaws.com/wukevirenesu/64684319739.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/87301208-9648-4f61-bffc-f053337f24fe/conjugate_acid_base_pairs_worksheet_doc.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0000449b-97f1-4ff9-a00f-823af7cf8684/book_review_on_pet_sematary_by_stephen_king.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_off000061d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61D1 5828 bytes
SHA-256: 4117a210e68d9ae8a1fbc5cfe6de4f7b6f8b672827f00cb17b8969b632b712b3
font_01_sfnt_off000075a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x75A4 10380 bytes
SHA-256: 553a372638f6b0ab595c3b895566eeea9a38131a818cd4122d110f9214290a4c

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