Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c9ca5cf012e3d73…

MALICIOUS

PDF

38.3 KB Created: 2020-10-06 16:05:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: a531bee90a6998076476369dda8aef94 SHA-1: e59b6d568b569608ccc950e7b09d40570dac2a92 SHA-256: 1c9ca5cf012e3d732527049758aa7a1011ccaf204c6abbc8f7e8a6345e3531c3
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=cloherty+and+stark%2527s+manual+of+neonatal+care+9th+edition In PDF document text
    • https://site-1040251.mozfiles.com/files/1040251/kewagesixokutidogigejudod.pdfIn PDF document text
    • https://site-1036816.mozfiles.com/files/1036816/42185217850.pdfIn PDF document text
    • https://site-1036995.mozfiles.com/files/1036995/10249980956.pdfIn PDF document text
    • https://site-1036646.mozfiles.com/files/1036646/32619299711.pdfIn PDF document text
    • https://site-1037228.mozfiles.com/files/1037228/jenepigunejov.pdfIn PDF document text
    • http://lewedone.shadesvalleyband.org/uploads/1/3/1/4/131437849/kumijoniruribex-zuvabamix-rawopap-vibobumukuwedes.pdfIn PDF document text
    • http://files.rioricocommunitycenter.com/uploads/1/3/0/7/130776255/481f72b098710c.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/1/0437/7290/3578/files/92539748773.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9289/3093/files/digiorno_pizza_cooking_instructions_thin_crust.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2232/7706/files/60048769965.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1789/4050/files/jan_brett_books_for_sale.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_off0000580c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x580C 5524 bytes
SHA-256: 6fcb404a878871078408e02e4ee87f095198e7d58810557a8e2965fdee253e0a
font_01_sfnt_off00006ab1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6AB1 9812 bytes
SHA-256: fd9587466349fc6c97367270f8f6b7d320a92b9ec273fb5946c2ad497602ab49