Malicious PDF — malware analysis report

Static analysis result for SHA-256 0abdcc18fd030cc0…

MALICIOUS

PDF

50.2 KB Created: 2020-11-03 04:27:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 2cd6ecef248090d1c57c6654b35590c0 SHA-1: 4fcffea42cc0ff063dcd6dfb5420a50f37ff52c5 SHA-256: 0abdcc18fd030cc019e164d0e8f2e40a39806360f605ce812942f38028c7e301
194 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains multiple heuristics indicating malicious redirector links and a link farm, suggesting it's designed to lead users to malicious websites. The embedded URL and the ML classifier strongly support a malicious classification. The primary malicious URL identified is 'https://ggtraff.ru/strik?keyword=emotional+agility+def', which is likely used for phishing or malware distribution.

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=emotional+agility+def In PDF document text
    • https://cdn-cms.f-static.net/uploads/4387233/normal_5f8cc6b98d94d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371790/normal_5f92efde926b5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417818/normal_5f9ef412dda47.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381551/normal_5f93c586d22ac.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369506/normal_5f8b434216fc8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365612/normal_5f9bb235a012e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369777/normal_5f88923a34c04.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382201/normal_5f99beaae1f7c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/59e13c04-0896-412c-8513-c055d3f8a6ef/vatunukuworovefekin.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/2324/4705/files/pokemon_fire_red_flash_hm_location.pdfIn PDF document text
    • https://s3.amazonaws.com/felasorarabipis/rawimetevupep.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0465/1951/7334/files/totipodedesagagal.pdfIn PDF document text
    • https://s3.amazonaws.com/tezofuretejom/xaribikun.pdfIn PDF document text
    • https://s3.amazonaws.com/mulerux/full_atx_mini_tower.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_off00008890.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8890 5012 bytes
SHA-256: f56dd5f0508ff1a0272b01a47102de08e84268262f870351a0f51d9e90ce56a1
font_01_sfnt_off0000999c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x999C 10008 bytes
SHA-256: b0af284fa3ce0c9ce6682319b59a15f5d7a426c1ad289cb8ed27c26c11b18121

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