Malicious PDF — malware analysis report

Static analysis result for SHA-256 85deaadf2eda8d37…

MALICIOUS

PDF

48.5 KB Created: 2020-10-16 01:54:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: fca683a95bf2ce67a94b442722712189 SHA-1: e2c360e41c36454d45fdc2554a2d9ecc2a710c9b SHA-256: 85deaadf2eda8d37490ad93b2d0566eda28dc9e368651d2da10e2977d1b6f384
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/strik?keyword=show+my+network+password+android In PDF document text
    • https://cdn-cms.f-static.net/uploads/4369774/normal_5f87e87c826db.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370054/normal_5f889833a21bc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368242/normal_5f88730f4481a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367310/normal_5f8742303b5fd.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/1/0493/1551/2479/files/25908366587.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/1093/0880/files/11581222334.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6499/1649/files/kenmore_800_series_washer_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/2016/3478/files/taylor_indoor_outdoor_thermometer_owners_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9f8f6064-392f-4711-be21-1cafbc62b919/lojemokagud.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2e71a123-034f-48fd-ba93-749d16853dcf/jisisanupaletexepadorim.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b00cc9e6-3c90-4e60-978f-6da1c722114f/wufaxupofegufukaxopu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8148/9818/files/43566114807.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/5394/6782/files/alchemia_story_guide_chapter_14.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/2307/2921/files/71787480837.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/2760/2840/files/holbein_watercolor_chart.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/2913/1175/files/additive_inverse_property_worksheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/8394/2038/files/cablevision_error_code_22.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aac83090-2ac5-40c5-9a8b-4e40e8b26742/jarubokekol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f1dcfa95-344d-4ec9-8311-0e1777e15b54/10286471292.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/efb0329c-8b95-4292-8095-7cfc09372f01/92177692374.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/40163530-0d1b-40de-92c2-fbf987af8806/75321798444.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_off00007e19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E19 5528 bytes
SHA-256: a659f96a35edc76c61f51831e626ebeb9fb940aab10acf91eeb62345b5c16cdc
font_01_sfnt_off000090c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x90C5 10856 bytes
SHA-256: 317d11646bbce9ea85e9702cb24428dd4e7cf1377cf6308c00dd0738bd91ef09

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