Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3d7ac3913483b0c…

MALICIOUS

PDF

47.6 KB Created: 2020-10-31 15:51:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: ed13b48b15090773c06e541a67c8f895 SHA-1: 93f4deb5954d00efac9b5ed939085b64e369386a SHA-256: d3d7ac3913483b0ceb62f18d87a694f434bf578a7fef922c04000c83683dd41d
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.cc/pify?keyword=shape+of+typical+p+orbital In PDF document text
    • https://cdn-cms.f-static.net/uploads/4381094/normal_5f9181b57c123.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367000/normal_5f872e1abea3a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373985/normal_5f9980892bc6b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378393/normal_5f951fcc9a20e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369638/normal_5f881ba38a56f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381291/normal_5f96b8c5c8912.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/fojaxexino/functions_of_brain_lobes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0492/7045/6476/files/porivaduvime.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8473/4883/files/ti-36x_pro_calculator_online.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/93d80d2a-904b-4e1f-abc2-3e666170c5f2/halfling_sling_staff.pdfIn PDF document text
    • https://s3.amazonaws.com/miwolezedubujoz/cambridge_english_advanced_result_teacher_book.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_off000078a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x78A3 5268 bytes
SHA-256: 053f72c1b1c85b12eaa977d86fb2cfd80e946ec5fdc787f5ae79bf8e5cbee1f1
font_01_sfnt_off00008a95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A95 11728 bytes
SHA-256: 7f4ad292c9a6f72c7158bb215f3287b7444b2a92dfa7b1a9b189661c051d8f10