Malicious PDF — malware analysis report

Static analysis result for SHA-256 2368f08bb8fabe76…

MALICIOUS

PDF

43.4 KB Created: 2020-11-04 15:32:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 90da31531b79dd429b38bfdb6198e07d SHA-1: dfbe92553970c9cb93f844aa48919ea589225374 SHA-256: 2368f08bb8fabe76fb57f264125b600cdc61cb485e47160e5f9878ffd7e89ce8
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and 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 4

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/123?keyword=kate+spade+comforter+costco In PDF document text
    • https://tetekejitinile.weebly.com/uploads/1/3/4/5/134584465/5838053.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366020/normal_5fa1c13844393.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378604/normal_5f9195eaf35a2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366400/normal_5f877911d0fe2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380226/normal_5f91c4363e823.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366324/normal_5f872033e2ba8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376619/normal_5f9206231e6ec.pdfIn PDF document text
    • https://ridulajevu.weebly.com/uploads/1/3/4/3/134352946/4102232.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412763/normal_5fa00dd66d9f6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/57f9e049-8105-43cd-8331-14426460d664/73818838376.pdfIn PDF document text
    • https://s3.amazonaws.com/sezutuma/national_bank_of_middlebury_vergennes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd25db32-6d6a-401c-a8ed-f0d1c141ec48/can_dogs_eat_maple_syrup.pdfIn PDF document text
    • https://s3.amazonaws.com/wonoti/denotation_and_connotation_in_semantics.pdfIn PDF document text
    • https://s3.amazonaws.com/ganubatebedoxez/yahoo_recovery_password.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/448bb7d9-140d-4c18-b615-6cde3391d288/kajovebipazexobugesenak.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c88bc4cb-1fef-4090-a48e-53a599b1991c/sufigimafidejasovir.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005ab9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5AB9 4872 bytes
SHA-256: 4526907b586c43d01e0cefcceb59bc0ee59ec47776df722d4a1bf8ea138b1511
font_01_sfnt_off00006b48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B48 11512 bytes
SHA-256: 008f1e6ce147e86bc534a56f22fc2bed0c5a8be7141ae1fefcc65227ab36048c
font_02_sfnt_off00009299.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9299 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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