Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8d68d0c196a9936…

MALICIOUS

PDF

40.5 KB Created: 2020-10-14 20:21:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 618051b4e8da67a71de739bd5dff191b SHA-1: 7fd4b28688180e9d34cca7aaeb1fe17de7f0572a SHA-256: d8d68d0c196a9936c974b8ba4478349522d3b9f1b75c94cb0fcf9745c0a51c0a
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://cctraff.ru/strik?keyword=toyota+yaris+2020+radio+manual+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366057/normal_5f870995d04e1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365598/normal_5f86fb05d101d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366305/normal_5f872c48c3f54.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365555/normal_5f870004bcbab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366665/normal_5f8720099e64d.pdfIn PDF document text
    • https://site-1036734.mozfiles.com/files/1036734/pukoxikupasulasela.pdfIn PDF document text
    • https://site-1039573.mozfiles.com/files/1039573/62985049423.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366009/normal_5f8710cc1862f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366402/normal_5f872f125c9ce.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365638/normal_5f8710fad361e.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/f840fa3a-983c-4c77-82ba-bb47865ab18c/zujefas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/3434/0259/files/tezalobamogoziwetewavu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/1947/2543/files/roxy_theater_lebanon_tn_phone_number.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_off00005f31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F31 5512 bytes
SHA-256: 354e5c4bb52b6f9224563858e89107f379fd29ba15c0d49a6be847fcad2404c9
font_01_sfnt_off000071d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x71D6 10476 bytes
SHA-256: 3c69327565a38c3e7c421594eaa54c1658b2e2e9896fe7fd70ea31da84e3e006