Malicious PDF — malware analysis report

Static analysis result for SHA-256 c36d7a15baaf6ca8…

MALICIOUS

PDF

52.3 KB Created: 2020-10-22 21:39:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 8eba20a1233d8fe75ab66e20d6e02d4e SHA-1: 690999c97b3a229adfcc49a53e4a8a9db48885d5 SHA-256: c36d7a15baaf6ca8a604b757e2cabbfc9f997124d17901bf78d5dbd5e09d1d61
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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.club/123?keyword=horse+turnout+blanket+guide In PDF document text
    • https://cdn-cms.f-static.net/uploads/4369138/normal_5f8aee26abb4f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365621/normal_5f86fe937c581.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379852/normal_5f8cebeab108a.pdfIn PDF document text
    • https://tenabawik.weebly.com/uploads/1/3/2/7/132710661/abdce.pdfIn PDF document text
    • https://jatorogerujew.weebly.com/uploads/1/3/2/7/132710569/jixidused.pdfIn PDF document text
    • https://vuzevarezevarot.weebly.com/uploads/1/3/0/7/130740461/2736734.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379842/normal_5f8c3f0283669.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379231/normal_5f8ea82c75312.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384029/normal_5f8c57a54ef42.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366020/normal_5f88a56441e26.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380854/normal_5f8ea9b27668e.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/tetazino/bebop_2_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/sugaguxagu/geometric_transformations_yaglom.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/96bdca1a-3372-481e-809d-25823be7d73a/dopinegiwedanasidorok.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a6d6168d-144b-46e7-af6a-57dcd0790027/24197403705.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f0d04694-9b07-4e57-b4a6-5c39ff9fcdcd/48829083876.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dceb2ac8-7ceb-4472-8cf0-6ce058f70fef/gudujuxiba.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b5c0ed51-844b-41b0-9c45-67ce189cb377/50891612247.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/4248/7458/files/23245120247.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0491/8018/0646/files/86620373957.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0503/5373/3790/files/sekux.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/0863/8106/files/advanced_excel_in_marathi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/7371/8422/files/application_of_lechateliers_principle_lab_answers.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_off00008d52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D52 5160 bytes
SHA-256: fb1b7ac74ee19a07fc001125e074ed5f9c5cea1e734facd2b450063ae5d09532
font_01_sfnt_off00009ee0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9EE0 10828 bytes
SHA-256: f0a75a8811502bb4a16fa1ec8a8f0557dd8539a8e768c58d4c59fdee37637a7d