Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff51f90a31e425a1…

MALICIOUS

PDF

45.2 KB Created: 2020-10-07 07:35:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: c27c6df00c4086bc72b5d5eff6df4614 SHA-1: 06ecc26760f9ba82cb5a02eddcfb95d6f0429457 SHA-256: ff51f90a31e425a16cd02da71d66919e173c4ca7bd0770f9518f768f1b8e05a2
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://ggtraff.ru/strik?keyword=augusto+monterroso+short+stories+pdf In PDF document text
    • https://site-1036625.mozfiles.com/files/1036625/rukawat.pdfIn PDF document text
    • https://site-1036815.mozfiles.com/files/1036815/dedexiwopirugozexepobubon.pdfIn PDF document text
    • https://site-1036864.mozfiles.com/files/1036864/powigorezitodevolewafaf.pdfIn PDF document text
    • https://site-1037000.mozfiles.com/files/1037000/57066776035.pdfIn PDF document text
    • https://site-1036872.mozfiles.com/files/1036872/badolafetefolevepogubak.pdfIn PDF document text
    • http://files.artdistrictgallery.org/uploads/1/3/0/9/130969003/5440747.pdfIn PDF document text
    • http://files.london-pet-grooming.co.uk/uploads/1/3/0/7/130739285/c2087ca05df7.pdfIn PDF document text
    • http://lipebu.curiouscreativecritical.com/uploads/1/3/2/7/132712572/617c6dc48e4.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/1/0480/5525/5204/files/brute_snowblower_parts_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/2520/5918/files/chitty_chitty_bang_bang_musical.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0492/0282/3331/files/vizukewozeborofunoreb.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0477/0263/8748/files/ati_teas_study_guide_version_6_accepted_inc._barnes_and_noble.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b46a480c-32ac-4265-89c8-63b38d1bb1be/4719302323.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a348b41c-fb90-44d1-b7c0-538460734001/wasukibidapigugagoji.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4ab25f1b-f904-4238-867a-47f58f7a6e77/85028453629.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_off0000736d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x736D 5204 bytes
SHA-256: fbea68a94e4af852dbfca0142d8d91d7b7878a608298ce73a6f9ba48d7d233e0
font_01_sfnt_off00008500.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8500 10244 bytes
SHA-256: ea6cef890f86e58dfd43b98f754d2dfd385d6052421680c08d8d1ecc13d4d0cb

Open this report in the interactive analyzer, or submit your own file for analysis.