Malicious PDF — malware analysis report

Static analysis result for SHA-256 3dd5ca3a1763fff8…

MALICIOUS

PDF

49.4 KB Created: 2020-10-12 22:24:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-26
MD5: 898dcfacd0c6d44e86b8f36e5488b3ec SHA-1: a43808acbf98e5caaad76d9d816dcd96e7d6f2ed SHA-256: 3dd5ca3a1763fff88acd9602c35c038996316ba71bacd528b683a5cb0de2cfd6
214 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Cloud document impersonation lure medium SE_CLOUD_DOC_LURE
    Document impersonates a cloud file-sharing service such as SharePoint, OneDrive, Google Drive, Dropbox, Box, or Microsoft 365 and asks the user to open, verify, or access a shared document
  • 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=free+download+play+store+for+android+tv In PDF document text
    • https://site-1037835.mozfiles.com/files/1037835/91336267192.pdfIn PDF document text
    • https://site-1040210.mozfiles.com/files/1040210/91012561781.pdfIn PDF document text
    • https://site-1039283.mozfiles.com/files/1039283/98496315839.pdfIn PDF document text
    • https://site-1038779.mozfiles.com/files/1038779/69785937571.pdfIn PDF document text
    • https://site-1040562.mozfiles.com/files/1040562/gamelezugokabexire.pdfIn PDF document text
    • https://site-1043537.mozfiles.com/files/1043537/56279651781.pdfIn PDF document text
    • https://site-1037024.mozfiles.com/files/1037024/8190612770.pdfIn PDF document text
    • https://site-1043218.mozfiles.com/files/1043218/zapuratiwawirezemolikude.pdfIn PDF document text
    • https://site-1036988.mozfiles.com/files/1036988/36855598491.pdfIn PDF document text
    • https://site-1038511.mozfiles.com/files/1038511/dikutefexekipexaj.pdfIn PDF document text
    • https://site-1037235.mozfiles.com/files/1037235/gegogozisipoxezipufobesub.pdfIn PDF document text
    • https://site-1042277.mozfiles.com/files/1042277/74722967916.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/1/0429/4118/6215/files/algebra_2_complex_numbers_review_worksheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/6681/3337/files/nezapova.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/0320/1694/files/pitbull_puppies_for_adoption_in_california.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/6976/7321/files/the_deacons_acts_6_1-6.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_off000083ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83EA 5244 bytes
SHA-256: 9c8f1eafcec18e1753a5e462ef9abdfc02ba38e428e8056ffbf7db371dd67990
font_01_sfnt_off000095ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x95EE 10192 bytes
SHA-256: 6f9720903d0a9090e96bf078a9f8d27539334feecb1a84472b1c4d2b6d663a76

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