Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7f3056d263fe55f…

MALICIOUS

PDF

42.1 KB Created: 2020-10-21 00:39:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 022bc74a3d36ad58b372a16efa3e1167 SHA-1: 40425a24e7d4cd566ea478d98c2e0196034b5d8b SHA-256: b7f3056d263fe55f0414bd739f8cc171358da6cb793c3cdd9abd2ff5ec879fd5
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://gettraff.ru/strik?keyword=twitch+prime+cod In PDF document text
    • https://cdn-cms.f-static.net/uploads/4365657/normal_5f87bccbee7b0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372719/normal_5f8a1e88e6c63.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368772/normal_5f8e78da8ebe7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366327/normal_5f8718949622e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366659/normal_5f8f194fc620e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368750/normal_5f8ca1024678a.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/wilugugo/rudufowo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1405/4300/files/sofuj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/1725/2249/files/marvel_future_fight_guardians_of_the_galaxy_epic_quest_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6104/3605/files/61246099359.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/8631/0304/files/rokiva.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/7797/0341/files/fikikobegunevexa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d9e55c1c-e517-4afe-8724-3428ec583e6f/2001_bombardier_traxter_500_service_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/145cee22-56ae-4c06-b16c-8d39041a9151/dakipokosigifovimasa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1742/1479/files/rootjunky_frp_apk_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/4062/2760/files/vipenupovixikunel.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_off0000665f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x665F 4932 bytes
SHA-256: cbb3badd68d7116f9d8b1bd45f569192199fb72c64e86343ecd3d9df9d3305b9
font_01_sfnt_off0000770b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x770B 10708 bytes
SHA-256: d4dc5ee2567be7f0de8ad8d8aef2de358bd7eee6cb1f2d618e17123e8b26f600

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