Malicious PDF — malware analysis report

Static analysis result for SHA-256 6aea45791c03ec6a…

MALICIOUS

PDF

37.5 KB Created: 2020-11-06 15:02:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-20
MD5: 6e325e06c717bc95a15446ff29544829 SHA-1: ef4ee2a76688caf33c4528578c98ff7422fd579e SHA-256: 6aea45791c03ec6a8472bb6f5a122a0aba76593d9eb37f6e13f049e12f2e62e2
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://trafffi.ru/strik?keyword=tobii+dynavox+compass+manual PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4426690/normal_5f99aa581e8d3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412588/normal_5fa2ef03b1b12.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376371/normal_5f9084d7f35be.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366625/normal_5f90da41a96c3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368218/normal_5fa1263143112.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368740/normal_5f8972f685c09.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375087/normal_5f8fead4ec9b2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366018/normal_5f870623bf0ae.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427282/normal_5fa15388be93b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374362/normal_5f96e07d15e04.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367656/normal_5f8925417e290.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/1/0433/5491/4981/files/easter_egg_clip_art_images_black_and_white.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e287cc12-cece-4b06-89f1-aa5ee39a2e44/wowukaz.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_off00005489.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5489 5440 bytes
SHA-256: e464e511e9c4832c220c5c95eb80e68cbb6889de1ee7719c304606a371c8acfe
font_01_sfnt_off00006705.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6705 10048 bytes
SHA-256: c5f07778ea46c815e5466aa28aefe08083f890f1329e41bc2f8e08b5e3838d93