Malicious PDF — malware analysis report

Static analysis result for SHA-256 883618f189252227…

MALICIOUS

PDF

43.9 KB Created: 2020-10-18 00:05:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 6b7e443d00a06c1856b8aa3a291eb02f SHA-1: 278b03439886e095b755f431406122780e679edf SHA-256: 883618f1892522277c6f6ffdb1403c55ec207dcc827f63992d6230e21c9820e6
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://ttraff.ru/123?keyword=hitman+sniper+apk+obb+latest In PDF document text
    • https://cdn-cms.f-static.net/uploads/4370076/normal_5f8a87331f2a5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373016/normal_5f8a93d971118.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/dac15405-9ccc-4bc3-8042-fccb12b9e4a0/pidipebotoligalumozij.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/efaa3573-b23e-47ca-a7f0-2930c7021651/37660932707.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9a2fe2d9-1496-483b-850d-5cb26ca58c83/bebabozawapo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c7edbd2d-8bd6-4b66-8fcd-5a093cd18a57/madudogukovebolamosufox.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/49026f6b-8522-4029-82c8-dbbabcdf9e2c/77896965972.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e950aa5-8c88-45fd-bef2-9c4b7af46102/xinuvikimadibexixuliv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/18a3a250-4c76-4d5d-88cc-d2af2ba9670e/19019215430.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6f49dd60-fd69-469b-ace6-89f4e7e39698/kilamijakofid.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b819e790-36ca-43cc-958d-f7a32bf83823/11461392861.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/3632/2203/files/30774694028.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7180/6366/files/52429305987.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/8259/8550/files/812134140.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/349102a3-97e6-4122-bbf6-6a49fa695ad0/29364748213.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0fd007f9-6cb1-4c72-8417-e54865da8584/pokemon_blazed_glazed_mega_evolution.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e6b7439f-91a3-4d2d-b6af-dc83e020d3a5/30044354588.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b0110ee7-6438-4be8-bcb7-0fdf3887b492/17353835004.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/3525/7753/files/mamejonuritebudafudulolub.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/8612/8313/files/infinity_wedding_ring_design.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/2846/1206/files/80182247131.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_off00006d40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D40 5132 bytes
SHA-256: a20451bf8311dab39979bc87572abb0a178ad1d26b329219446e9419bd966a78
font_01_sfnt_off00007e86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E86 10696 bytes
SHA-256: f8ad7550dbe03ab898eca5f3dc84315691f23adba2e810425769f0365bfb7f41

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