Malicious PDF — malware analysis report

Static analysis result for SHA-256 494650f74621ab14…

MALICIOUS

PDF

41.4 KB Created: 2020-11-02 15:48:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: fea7d6cb93bf35dd1367031069b3b13d SHA-1: 55fd46b2d73d710478110b33cc5770fe534cee24 SHA-256: 494650f74621ab14d389846e71a1afcd44ebc0c9c194694161699f1de4c7e0a6
134 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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/aws?keyword=conv2d+keras+example In PDF document text
    • https://cdn-cms.f-static.net/uploads/4404488/normal_5f9e1829394c9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377401/normal_5f8d9a7372c75.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418584/normal_5f9c99798c563.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393193/normal_5f932be2db6d5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4394073/normal_5f96478b785f0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/gupuso/65790967608.pdfIn PDF document text
    • https://s3.amazonaws.com/pegek/avicenne_energy_2016.pdfIn PDF document text
    • https://s3.amazonaws.com/sabegokek/curtis_wall_street_carroll_2018.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/9549/9968/files/methodology_quantitative_research.pdfIn PDF document text
    • https://s3.amazonaws.com/memul/65980422244.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c984ce15-0a15-469e-a1db-5dab48960147/14188947789.pdfIn PDF document text
    • https://s3.amazonaws.com/lejivugeleguwod/44855052890.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0503/1526/4168/files/4160274759.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/497b91fe-87b9-49b2-aad5-9299816058ce/ninadofaxu.pdfIn PDF document text
    • https://s3.amazonaws.com/pusolefosex/ragunurikimebanovujumono.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_off00006183.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6183 5336 bytes
SHA-256: 46db211d55228fea63e8d9b2f7e4d9df076afc877ee71151da269a802931d8ee
font_01_sfnt_off0000739e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x739E 10932 bytes
SHA-256: eab7fc5c96dcb7344767aad9727a3ca801f268d6848ac6559ff863d7ab9201b9