Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b514ec877f8c318…

MALICIOUS

PDF

43.0 KB Created: 2020-10-15 23:04:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: e69d3f36528102f0a1b989a5f536e832 SHA-1: 766f124c91d7ce417ba9d6287d013d0885a222ce SHA-256: 2b514ec877f8c318d9886cff561f561eb8fe64272a8f392e210f312e2af7ff82
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/123?keyword=opalescence+whitening+35+instructions In PDF document text
    • https://cdn-cms.f-static.net/uploads/4371013/normal_5f88a4ac922aa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365634/normal_5f86fbd91b5ce.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366666/normal_5f872921425e9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367281/normal_5f8864a8e170d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0494/1748/6503/files/perro_del_hortelano_alan_garcia.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1984/5278/files/wii_owners_manual_troubleshooting.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3448/4648/files/41130209838.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/2297/4627/files/luxebovosusetolidofakeb.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8987/7405/files/fekeriluvu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/2381/7640/files/ffxiv_arcanist_leveling_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/1246/7106/files/zizasotebowanikifusag.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/4279/0298/files/pufumopafumamuloliweligot.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/6901/7763/files/fried_green_tomatoes_script.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e2aaa3f9-773d-40b6-bdd3-632fc6ef14c2/9056636783.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b68912f1-1486-410e-9498-3958a97b9945/wuwagemasibasozonorebig.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/0375/0817/files/constitution_party_platform_beliefs.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/1620/2651/files/fozanukemesubabopa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3366/5441/files/susekotipokofofa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4053/8773/files/99789552433.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/5719/3895/files/jetotimitumiwuruno.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_off00006970.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6970 5600 bytes
SHA-256: b91d71a40f1a06d2871c11e3f3f2e96b7ac5cdaa8fcfe480ba49ad28c4cc2f92
font_01_sfnt_off00007c87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C87 10076 bytes
SHA-256: 5ff6b424ebab55d62b7da0629c084ee54183cad62900131cab913f7f36078359

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