Malicious PDF — malware analysis report

Static analysis result for SHA-256 1433228325d9921a…

MALICIOUS

PDF

34.7 KB Created: 2020-10-07 05:27:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: c44e9bfd035a904951ce9552e1e24002 SHA-1: 519b2ebf476399685d376addbf7fed8b8fbbbb73 SHA-256: 1433228325d9921afde97e7aaa850160b35b2a7c90b2c080c6b52321e837115e
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=monster+guide+5e+pdf In PDF document text
    • http://zufokedi.christophers-crafts-paints-photos.com/uploads/1/3/1/3/131398125/fazali.pdfIn PDF document text
    • http://webudejat.madmavenscreations.com/uploads/1/3/1/6/131637432/webet_tisodimatatuviw_rokoxatimefuped_tigugegukogo.pdfIn PDF document text
    • http://files.northendoutdoors.com/uploads/1/3/1/6/131637589/dagamegarabokotiji.pdfIn PDF document text
    • http://files.indoagro.co/uploads/1/3/1/4/131453560/3029302.pdfIn PDF document text
    • http://tuker.writerliz.com/uploads/1/3/2/6/132696323/sadofibupizi_vijilidu_mezuxur.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0463/1507/7792/files/jurazezulemupewirizog.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0462/4842/7671/files/what_are_the_core_electrons_of_strontium.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4938/5126/files/repairing_family_relationships_in_recovery_worksheets.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ca9c1083-a0de-4166-b9ed-a02067e03267/wotomaxaralotixof.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d5279bdc-93d0-4bf9-9c66-e222bdb0ea2e/98665568576.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/179a3753-ce7e-4c8c-8b74-c2eb2bdee5f6/18390812930.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/17c7ff1e-a7bd-40b9-a7cc-533baf2d6f9d/13446109873.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3aab4059-48e7-47ea-a4fb-a4f5870ff306/sefalubozujiro.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/6643/1909/files/evony_age_2_valley_attack_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0234/6148/files/how_did_johnsons_plan_differ_from_lincolns.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7519/0422/files/biwep.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/7740/5334/files/chat_bypass_script_2020.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_off0000498a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x498A 5096 bytes
SHA-256: 24e2944904add17ed90b8d91846acc87db86485f55ec7fc2152d3616a1984e0d
font_01_sfnt_off00005b01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B01 10356 bytes
SHA-256: 124e0e81e17242c2dcbbf051b125a560a86f13da2afea5077388140b03509cdb

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