Malicious PDF — malware analysis report

Static analysis result for SHA-256 1749e14c41d35db6…

MALICIOUS

PDF

41.4 KB Created: 2020-10-06 12:46:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: ecafe05988861594e67b180fb07b7d86 SHA-1: b4c5b3b4e40889bfde6daf311847ec570dafec65 SHA-256: 1749e14c41d35db6eec6553f9387c0b917269913509fd4794472d82b0d96d669
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=adeptus+titanicus+pdf In PDF document text
    • http://wabefe.nnft.ca/uploads/1/3/1/6/131606666/5119180.pdfIn PDF document text
    • http://desixe.vahana.ca/uploads/1/3/0/7/130740141/363.pdfIn PDF document text
    • http://files.juliacellini.com/uploads/1/3/0/7/130740466/4132769.pdfIn PDF document text
    • http://noxomanab.gythapress.org/uploads/1/3/1/1/131164250/59bb6430.pdfIn PDF document text
    • http://gufogufit.chestateehighschoolbands.org/uploads/1/3/1/6/131637649/baxexumeke_kapak.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/1/0432/2649/7182/files/sadixilives.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/0441/4120/files/62319369983.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7008/7587/files/project_payday_2017.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/6668/3292/files/16162978191.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/9653/7243/files/51396643183.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/27c46bcc-1a7e-46a5-af3b-f8cc40da73aa/23422818418.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1deea842-8d35-4ce5-9c47-078688d35000/vojugu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8233/3864/files/vuvajinedusowilava.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7537/9101/files/43553258980.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/1028/4456/files/59357359858.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6998/0320/files/wijunokaraturupuleje.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3292/8671/files/principles_of_microeconomics_final_exam_study_guide.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_off000062e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62E9 5012 bytes
SHA-256: ed2fe93506869f82998fb13dab0202eb06e66e8e17c6728975c95ffccc4a29c4
font_01_sfnt_off00007410.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7410 10768 bytes
SHA-256: e400d277b8ef8991be383f1b7a95d6e451a96a9175db50afb7579869379e2827

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