Malicious PDF — malware analysis report

Static analysis result for SHA-256 6469678a4729f240…

MALICIOUS

PDF

39.3 KB Created: 2020-10-03 06:19:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 7246b1a95d90b97b09fcf4a0c755ff4f SHA-1: 93af4bae90a81b7b5e558c2855940038e48ce126 SHA-256: 6469678a4729f2400d7ecd0671aaa927bcac39b0d1a16607845d7701ce0339d1
194 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded links, many pointing to redirector infrastructure like 'ggtraff.ru'. The heuristic firings indicate this is a malicious redirector and part of an SEO link farm, suggesting a phishing or malware distribution scheme. The document body, though heavily obfuscated, contains URLs that are likely part of this lure.

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=graeco+egyptian+magic+pdf In PDF document text
    • http://lonewixaw.jeanetterodriguez.net/uploads/1/3/0/8/130815017/cc194c8aff8.pdfIn PDF document text
    • http://davon.justglowsudbury.com/uploads/1/3/1/6/131607163/d7c51ce4.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/1/0486/6719/7590/files/kingsbrook_jewish_medical_center_closing.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/4091/0755/files/8991707929.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/6164/7262/files/46938570363.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/5916/9448/files/types_of_newspaper_format.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/4435/9322/files/mapa_de_pr_por_pueblos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0488/3008/7333/files/ultimate_comics_spider_man_vol_1_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0462/5979/8167/files/16838114275.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/1269/9798/files/my_name_in_chinese_meaning.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1479/1069/files/nimevovevokikifisiwemi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6346/6389/files/wijawejabipewitewedovu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d28ee73f-b15a-4f2b-aa0a-984b1b3947c3/97218233402.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4dfde052-3829-44eb-9781-0081abc88428/55013888090.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/20813eba-dfa9-46ba-83bc-f3d2021c4c4f/13876244667.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_off00005d9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D9B 5396 bytes
SHA-256: 1d6b63582c3cee957fcc027ec54932fa727ba84b6ec879273dd0943898398247
font_01_sfnt_off00006fef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6FEF 9544 bytes
SHA-256: 73ebf671255957e5b3adfe013cb6361c8c6db49dbf70056d6322a55a5e46b356

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