Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d4db9c61341eb15…

MALICIOUS

PDF

43.1 KB Created: 2020-10-31 00:40:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: c33ad1fbc469b180901bed688075b839 SHA-1: 8ca5242cc1f7f8e8eb224577b3f11a8c5dd49e07 SHA-256: 2d4db9c61341eb159fcad8a8b9b8cfbe3621551f1b63df8a4417b349285351f9
134 Risk Score

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.
  • 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/aws?keyword=chickadee+house+plan In PDF document text
    • https://cdn-cms.f-static.net/uploads/4369304/normal_5f891815e84ea.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375076/normal_5f8c791b00121.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369138/normal_5f96626b61a61.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366980/normal_5f874a1cb9e53.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379482/normal_5f8baa2ff0818.pdfIn PDF document text
    • https://ridolagu.weebly.com/uploads/1/3/0/7/130775195/4557862.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366325/normal_5f8e3a40e8f01.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366321/normal_5f95581ad9aba.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off00006d01.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off00006d01.bin)
    • https://uploads.strikinglycdn.com/files/0b7102de-dd3a-4aa9-875a-eceaf051abc2/89821596559.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/6209/9607/files/16154695682.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1c4a7fc6-4b14-4aa2-b517-4df18b82d5db/sufikikinaxavav.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/8624/2483/files/zubamitikatogofemino.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6b584380-542d-4997-85d1-abcdd13dd44f/80097382127.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 extracted file (font_00_sfnt_off00006d01.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006d01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D01 5032 bytes
SHA-256: 0c8b4fdfc05063708430cf59d8e551770512c83930af70d89bd21ea8ff438ebb
font_01_sfnt_off00007e1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E1A 10012 bytes
SHA-256: af98cb57e7b8f8e105a706946d0bcb2f4582ea6ca9060c32de6d7bb72d09d548