Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa758bd10b210c0e…

MALICIOUS

PDF

43.7 KB Created: 2020-10-24 20:20:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: ba761c80a12242bca70945b8b4549e5c SHA-1: 97db1e26724890b54a75fd304138d0ddc0930f08 SHA-256: aa758bd10b210c0eb51ff6539dbf0f9e0a86b8f35eb6ec2cc0f03b9bf21edeeb
134 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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/aws?keyword=how+do+you+search+a+pdf+on+a+mac In PDF document text
    • https://cdn-cms.f-static.net/uploads/4368265/normal_5f87ba6204ba4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378855/normal_5f9153f4d7154.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380384/normal_5f938fad8ba15.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369904/normal_5f8b09ce5edec.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384836/normal_5f8fbbfd46d24.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366317/normal_5f873f3e2727f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382621/normal_5f8da1baa874b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365659/normal_5f88d13872ad4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365612/normal_5f87ae8e006f1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372399/normal_5f903c8c16fe7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384460/normal_5f917e7396aae.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373788/normal_5f893c3214446.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366041/normal_5f8e122d98f18.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372087/normal_5f8e0ba70031b.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/fb8dac39-bad0-4165-920f-97d99b76f0ba/18231853474.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4931346c-1066-4af1-8358-a604f4a6c8b4/68035247666.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f976a12c-e243-4256-bfe6-2ef183d56fe1/rirezixulawigerepez.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/54ded78b-bc21-498d-b64e-2750bb4929e5/jogevofowas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/40afeaf8-f996-4651-a289-ec8656f7d667/40799924540.pdfIn PDF document text
    • https://s3.amazonaws.com/mijedusovineti/nedafo.pdfIn PDF document text
    • https://s3.amazonaws.com/wilugugo/wofulaguvuwofagiti.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files/72631700885.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_off00006995.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6995 5516 bytes
SHA-256: 735535a4ec3bd9c84745a90bb9ab6a397fe33769e41d6d9a61f010f5148a56a2
font_01_sfnt_off00007c48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C48 10964 bytes
SHA-256: 7edc76e0cd43f8cbbe68af52f22999ba62702fe4f60e6ad1523e47902439daff

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