Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ba8861e587ce5bb…

MALICIOUS

PDF

44.6 KB Created: 2020-10-26 17:15:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 2182371b1222f5f62e0ffc3619490907 SHA-1: 3e88546b752cbdaecdd8251bef9b49f35517048a SHA-256: 9ba8861e587ce5bbeb4313ff86f29a93f99fc5b460cea97b54e77e645be21aeb
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded links that point to a known malicious redirector. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains a URL that matches the malicious redirector found in the heuristics, suggesting an attempt to lure users to a harmful site. No scripts were extracted, but the presence of multiple external links indicates a link farm or redirection strategy.

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://ggtraff.ru/strik?keyword=pathfinder+lantern+king In 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/a96e9dc5-ad26-4cd9-b550-5490de9fa854/25640152285.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0bc022b7-b0c4-441b-bc76-215681992181/mtv_unplugged_nirvana_full_album_download_zip.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b6178aa8-1d11-4ea2-bc25-b8966db4fb72/concepto_de_competencia_segun_autores.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/48f96f5b-255a-450d-9568-e7b06a249351/94469768703.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/3012/1112/files/28597644885.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/799dc183-3e9c-4b93-be3f-435c95e9fa0f/38739814742.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aa0322a4-2c2e-41dc-b525-d03594aa6a6d/96542469662.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3c9b82bf-4c7e-4022-ad4e-c791f2cc793b/deezer_premium_code_generator_no_sur.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d037dc2e-eb36-446d-a42e-ae0160da0c9f/52800994379.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fdfb6804-06b8-4902-af00-09091e95c1c0/34756609944.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e6439306-49a2-4c14-894f-e4adae49439c/84860017158.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/784c7c50-f95d-46bb-9758-9c61ccd5f7f3/21984388388.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d181ac6d-9dfe-4ffb-967b-1755c9bcf068/sztr_angol_magyar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2be611f4-3eed-4598-8bec-e629862e2418/81799587152.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/71992935-5c0f-48c6-9a57-0939076464e5/54297037694.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9ed9b244-01aa-4eba-92a4-aedc39afa5be/tawibavoradu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/455de801-3ec6-4173-aa88-41a307ce96d9/suketesagusukaji.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b8aeb8d6-861f-409d-af57-1a99dc9ef0b0/90630379251.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_off00006f11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F11 5056 bytes
SHA-256: 86ebb140f88f9dee6e0e5cbb4bdcf9fb8c7c06d0a32c6e23137c2c5feccb893f
font_01_sfnt_off0000803a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x803A 11204 bytes
SHA-256: 4f32f437d48cb73849df25bf82478bec1f814c1e424e1f63b6d514ffdb048324

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