Malicious PDF — malware analysis report

Static analysis result for SHA-256 285ed9654bb3d0c6…

MALICIOUS

PDF

38.9 KB Created: 2020-11-04 11:15:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: 031cfd39cf2122ade74be3ed6f93552a SHA-1: f6a6dbf79f251c5fc82f211def538ccad2dc7dee SHA-256: 285ed9654bb3d0c6b0dce20e7afa52ada3a5e73bf4c8bb65582b44c0ce25e410
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://ttraff.me/123?keyword=middle+school+volleyball+pics In PDF document text
    • https://cdn-cms.f-static.net/uploads/4411001/normal_5f96fcc5e7c6e.pdfIn 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/fe4f7bde-7814-4fd9-bc62-e18ea9ad821b/zizuzoganexawogi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6ca041ce-f412-4552-b50c-ad0ea65088cc/yellow_jacket_vacuum_pump_parts.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/931b2899-cfd7-4da8-88a9-be5a3886945e/lexepovebirapopamuxa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/99a1b4da-15fe-42a1-a9d7-b35ebd18d0a8/levotelusobubujunavu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f0c0609c-38a8-401f-a616-ed77a5c0b038/67164343321.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/43b955ce-7114-45ef-aca2-3a3ae7b970d9/9025523224.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bc3b14d7-71b8-49f7-8549-6ec8bdd9067d/kikufenusu.pdfIn PDF document text
    • https://s3.amazonaws.com/zetare/dijozefuguzujazonikanu.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_off00005bd2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5BD2 5372 bytes
SHA-256: 96a2e074c18c6259a3dd9bbb3f72ddd3365f05c29ebce6421c9d51677a73ee5b
font_01_sfnt_off00006e2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E2C 9792 bytes
SHA-256: 1168cac43cfffdd9e98643ee5d398b44b47381f850cdb0c6de11354877d1a932