Malicious PDF — malware analysis report

Static analysis result for SHA-256 20ab8c9be8db87a4…

MALICIOUS

PDF

47.9 KB Created: 2020-09-30 07:45:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: 492b978f28a66a1b8e338dd8d6ffbe75 SHA-1: 15314312569f8918ccedc197842d548f034d5a06 SHA-256: 20ab8c9be8db87a4ca7a7fb473c4db50ce76912900a26e011debb91a7ee6e05a
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/strik?keyword=arduino+due+manual+pdf In PDF document text
    • http://xodezum.voicesofthevalley.co/uploads/1/3/0/7/130738973/nidowemubida_dewetiku.pdfIn PDF document text
    • http://regajite.dreamworldliterature.com/uploads/1/3/2/6/132682883/kizinoxepumu.pdfIn PDF document text
    • http://files.axometrodetroit.com/uploads/1/3/0/9/130968958/gugizemuvo.pdfIn PDF document text
    • http://files.noiteediamusic.com/uploads/1/3/1/3/131397971/fewosakukidezazo.pdfIn PDF document text
    • http://dariwoku.nirvanatails.biz/uploads/1/3/1/3/131379227/nexititakezuwes.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/f86c5a54-16d8-4890-a53b-284fadfc457c/23732931121.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a4a876e8-2c52-445a-a547-0112822546c2/5237110324.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d44933c7-cff7-4201-94d0-0ae75431a15e/zadel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d12e24eb-a081-4069-af56-8256b086e1a1/xotitiguwema.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7744/3483/files/vapadigavazijedaposow.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8064/6807/files/wuvubejip.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/2331/6630/files/hdfc_loan_approval_letter.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f173d222-e2b0-4e69-9890-e3b02e651965/xafitupivorosinaw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e7458c94-4218-4f29-a865-a42e6fd46c0d/karevapifavovevub.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 4

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

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000690a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x690A 4800 bytes
SHA-256: fef39aa88794875eaf132e9112b5954bfa9ab0fb02c48cfd6fe46cfc1890e191
font_01_sfnt_off0000792c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x792C 14336 bytes
SHA-256: 98e3cd80759eae0e10b260a54915920af1c2c7755e32cac8e37ed6d2ded97cc2
font_02_sfnt_off0000a511.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA511 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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