Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef4dd1d55ff916c0…

MALICIOUS

PDF

70.2 KB Created: 2020-10-22 11:57:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: 2e00a58e3d65fa75fcc20b036ecd7b2e SHA-1: 90608a52667e3204722f9761828f18640e6cd516 SHA-256: ef4dd1d55ff916c0e57bd7ce3e5a7d514868e777ebf37f2695d13380684c0a13
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://ggtraff.ru/123?keyword=microphone+app+free+android In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366339/normal_5f8b0c0de406f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366969/normal_5f8baaef5c584.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388841/normal_5f90e666d77a4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375075/normal_5f8b57c3d6415.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/6f5e62d2-8d70-4b1c-b490-394d45c21758/21855187948.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/123678b4-58ac-422d-8168-6d16d0da2057/kixapopirikutirasi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4131/6264/files/leridobiwovudonawirekod.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/3154/2983/files/the_big_bang_theory_roommate_agreement.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/8661/8017/files/teenage_mutant_ninja_turtles_apk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/3615/5285/files/comcast_knoxville_customer_service_number.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/7987/4213/files/shibuya_109_shopping_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/6424/8470/files/fisiopatologia_da_osteoporose.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/2094/9403/files/amaravati_kathalu_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7622/2118/files/virtual_dj_pro_7_manual_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/68846e22-0c29-4c3e-ab14-b68ecf994c06/kixudedoradulibabil.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cf78f847-13cb-4e78-aa48-39b99f50128c/labosuwuv.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d5e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5E2 5036 bytes
SHA-256: da4c81b1f38f304b46a67d50b6f8db88d44cdaba0ab2604ee4f8558be56ad01f
font_01_sfnt_off0000e6fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6FD 10760 bytes
SHA-256: 3b113896401cfc6896371e3f2b42c9e4c02f4cf027399d7fcf856eb5a8bae67d

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