Malicious PDF — malware analysis report

Static analysis result for SHA-256 89d1716dbd21f4a6…

MALICIOUS

PDF

54.6 KB Created: 2020-10-05 18:10:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: f69debde0a90ef4841a409b684c4867c SHA-1: 58365b22da8f40d6f1c264b12d967bd3dd3b417f SHA-256: 89d1716dbd21f4a60ec131cea09aa9a8adafaf2576aca6d0745f8a6fb3418650
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://cctraff.ru/strik?keyword=star+trek+adventures+core+pdf+download In PDF document text
    • https://site-1037211.mozfiles.com/files/1037211/71118516857.pdfIn PDF document text
    • https://site-1037120.mozfiles.com/files/1037120/jipeguwegab.pdfIn PDF document text
    • https://site-1036814.mozfiles.com/files/1036814/radarafipam.pdfIn PDF document text
    • https://site-1038932.mozfiles.com/files/1038932/47099431548.pdfIn PDF document text
    • http://files.conservationoffineart.com/uploads/1/3/0/8/130814124/vogowaxoku.pdfIn PDF document text
    • https://site-1036900.mozfiles.com/files/1036900/zofavoxemavofakasoreki.pdfIn PDF document text
    • https://site-1036646.mozfiles.com/files/1036646/zobogokitupu.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/1/0440/3258/9989/files/25798930548.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/0263/2104/files/pascal_triangle_java_arraylist.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/9977/0017/files/ending_sounds_worksheets_preschool.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/3124/4195/files/zowuporigekidafulaxirodu.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_off0000966e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x966E 5468 bytes
SHA-256: 52c0a6b58f0d6e66908c7bf771cf96462d2b8374dea521a02560e7f60342183d
font_01_sfnt_off0000a932.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA932 10772 bytes
SHA-256: 3bf83f2a3ae35ea61065f584341d2381b235f5689ee423d865d1f028b62c0064