Malicious PDF — malware analysis report

Static analysis result for SHA-256 485dfa23405d0bc4…

MALICIOUS

PDF

45.3 KB Created: 2020-10-14 04:18:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: d87b68359afc6c291c424f5bdde56dc8 SHA-1: b8a999b9a513f92d2b94535b9476e84aa21a61e3 SHA-256: 485dfa23405d0bc414e0d46d94076d23e9e0c0c4d2c1e59bddeb24036a3c3051
202 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://gettraff.ru/strik?keyword=sqlite+crud+android+github In PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/nipomomuka_gisotufeje.pdfIn PDF document text
    • https://mogilifus.weebly.com/uploads/1/3/0/7/130739831/059d55fbff3.pdfIn PDF document text
    • https://vuxozajuje.weebly.com/uploads/1/3/1/3/131379873/3257372.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/344e80d9-014c-47a6-823d-26b05227dd7a/xozuzani.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c7c47c5-c1d4-44a0-9078-709d0979a5e3/pomixa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f3f5999e-4a7d-4a4d-8975-8bc1ee29bcd6/26252718736.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d97d4c47-e472-430d-8aaf-13a69aaa65fc/mixodig.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0465/0634/4606/files/pefopasa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0405/8010/files/savuzobude.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0492/2599/0300/files/82187099230.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2236/0469/files/tulefoveniwozudugaluz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9885/5840/files/84381266881.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/2465/6802/files/platform_revolution_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2828/2529/files/71737077115.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_off000065e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65E2 5392 bytes
SHA-256: dead9fb2088f2dc3fbafd9accecc1b5a044f74736029cb56c5032ed90c722153
font_01_sfnt_off00007819.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7819 15704 bytes
SHA-256: 708a1ac40c742823324d9dbb21ec78f8d72fb0d8c187917edf65273abd4f3e65

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