Malicious PDF — malware analysis report

Static analysis result for SHA-256 ffad9f877962d007…

MALICIOUS

PDF

47.0 KB Created: 2020-10-19 04:02:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: bd14929305e07c7695a9336269265c6a SHA-1: da7849bc5b9fbc556f13ae741f7ae30736d9795b SHA-256: ffad9f877962d007ef86a9303882dcea37e4ca83f5d190dc1a9939f987de9bd4
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://cctraff.ru/strik?keyword=machine+gun+kelly+bad+things+download+mp3 In PDF document text
    • https://cdn-cms.f-static.net/uploads/4379612/normal_5f8b00c17c33d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365634/normal_5f87307264db1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378167/normal_5f8ae7e5bddc1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367621/normal_5f879edcccfdc.pdfIn PDF document text
    • https://wefamojugibe.weebly.com/uploads/1/3/1/1/131164519/rudijodomusefodupij.pdfIn PDF document text
    • https://zalopajozi.weebly.com/uploads/1/3/1/4/131453352/fovizulamuwaletivub.pdfIn PDF document text
    • https://jezaxegare.weebly.com/uploads/1/3/1/3/131380636/xesaz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371523/normal_5f891bbe24091.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366057/normal_5f885d27827fe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371020/normal_5f889eeed60c6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370074/normal_5f8cbe38418c4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369916/normal_5f89787979b94.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369189/normal_5f87ad21605f9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372378/normal_5f891531ac905.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365599/normal_5f872ef29d067.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2771/6506/files/melamijademotul.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/6158/9669/files/tamera_mowry_housley_net_worth_2018.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2517d1ef-8841-4205-9a8f-1dd6636e167d/82556764729.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dfb08af5-8c8c-442e-ac93-66a358a987f8/61249508217.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_off0000785a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x785A 5960 bytes
SHA-256: 6b8ca06a0fbd1eaf6cb9b6a2fe258b01efae6a9fe1408215e247dbca5873077b
font_01_sfnt_off00008c8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C8C 9900 bytes
SHA-256: 0bd5bfaa210f392d55d794e8908fef92024d855ccf78629649dd294aa593169d