Malicious PDF — malware analysis report

Static analysis result for SHA-256 d20e9b91ff4bf443…

MALICIOUS

PDF

40.6 KB Created: 2020-10-27 06:55:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: bdfd20486f1d1aa7da1b8324cb8a74d3 SHA-1: 927a76a622c01ef302206c1221f189acfd19fa55 SHA-256: d20e9b91ff4bf44379406320cc704018d2120f47c71d3040fd5aa367e84df6fe
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/pify?keyword=ps4+fortnite+controller+guide In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366319/normal_5f9503e3880dd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375357/normal_5f964e2977c54.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368248/normal_5f9414d264ced.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366646/normal_5f876cf119176.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370089/normal_5f8e60c60db59.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366313/normal_5f8729f78f10d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381976/normal_5f973bbf6cd9f.pdfIn PDF document text
    • https://fevapeju.weebly.com/uploads/1/3/4/4/134468187/957504.pdfIn PDF document text
    • https://bizumoku.weebly.com/uploads/1/3/2/6/132681494/fakovitexagazen-nuxaliladovobos-zuxasuru-zileniwijebunab.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off00005ffe.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off00005ffe.bin)
    • https://s3.amazonaws.com/babetafaperaxov/crimson_skies_board_game.pdfIn PDF document text
    • https://s3.amazonaws.com/mijedusovineti/ximonenap.pdfIn PDF document text
    • https://s3.amazonaws.com/mozirolinitaje/50351337657.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/6721/1428/files/javascript_mvc_tutorial.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/7973/8567/files/schemas_android_apk_res.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7704/2337/files/coding_games_in_scratch_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/7669/7246/files/why_do_people_join_cults.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/428f0729-b0dd-443f-b349-5983e165a193/tixugokoxixokinawegarup.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a3644720-ebaa-4a48-861f-b347d0d7d327/60250143368.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 extracted file (font_00_sfnt_off00005ffe.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005ffe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FFE 5068 bytes
SHA-256: 3fa6fef7e5aabed52bd38cff668f71abf21909f0c83f9529bd0d99e46cc141af
font_01_sfnt_off0000714e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x714E 10584 bytes
SHA-256: a9341ac2b8d56d04bcce2ed42fcba90035b8c96a615ffdbada3030e470db6a0f