Malicious PDF — malware analysis report

Static analysis result for SHA-256 863faf62e9dd95a8…

MALICIOUS

PDF

50.6 KB Created: 2020-10-15 23:31:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 18534c9c7006579ae1f206c40aaf396c SHA-1: 35d67c6604f92c29a3eca33462ea214dc837487e SHA-256: 863faf62e9dd95a890e04abbf9379f7a5153d405e076d25975ed00476f1857b3
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/123?keyword=%25D1%2580%25D1%2583%25D1%2581%25D1%2581%25D0%25BA%25D0%25B8%25D0%25B9+%25D1%258F%25D0%25B7%25D1%258B%25D0%25BA+%25D0%25B4%25D0%25BB%25D1%258F+%25D0%25B8%25D0%25BD%25D0%25BE%25D1%2581%25D1%2582%25D1%2580%25D0%25B0%25D0%25BD%25D1%2586%25D0%25B5%25D0%25B2+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4367642/normal_5f876129cd64c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367000/normal_5f872f676a58d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365562/normal_5f8859c298a6f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366987/normal_5f889660ca9fe.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/fd4ca811-889d-475d-82e0-812bce08b2f3/85891500218.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/50342610-3326-4206-9702-938cde9001a5/bufejebepibixusoxigilim.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d95374cd-ad67-417d-8092-29dd36eea377/wefimilogiguxemisuleto.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/5567/5552/files/la_fitness_headquarters_telephone_number.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0795/7400/files/triangle_similarity_theorems.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/5595/3558/files/jakawajuwiwozalonag.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/0058/0256/files/blood_of_the_dead_pack_a_punch_spots.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0492/2372/9318/files/newnan_high_school_athletics.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0462/0232/3094/files/abington_community_library_hours.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/9162/6657/files/7521618496.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/8282/3333/files/pokisirobusaborijososured.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/3544/6424/files/singer_curvy_8763_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/9688/6440/files/4792707846.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/4012/6614/files/rss_feeds_list_uk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6890/0006/files/black_scholes_calculator_online.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0494/1748/6503/files/ocarina_of_time_randomizer_tracker.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_off000075d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x75D3 6440 bytes
SHA-256: 3807d043659c1667dcc342d1b8e43bccf486e999a9468f7f8a3339f927e4bce5
font_01_sfnt_off00008acc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8ACC 15420 bytes
SHA-256: 13e8fcd63c41b2b10890f48b2c89a670a6f93e2bbd275785e7edab5aec3f83c8

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