Malicious PDF — malware analysis report

Static analysis result for SHA-256 923b21e4aaa3f8fc…

MALICIOUS

PDF

48.5 KB Created: 2020-08-14 02:25:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 3b085dcfb860d327bd40283d410bf30d SHA-1: 4d49e7fe5d3e9c7067f8c4dd5c35aa12525697ba SHA-256: 923b21e4aaa3f8fc58b9ba30576fe52512798c79c819b65e4b53fc700036e754
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a large number of embedded links, a technique often used for SEO poisoning or to direct users to malicious sites. One of the links points to a known malicious redirector, ttraff.ru, which is a strong indicator of malicious intent. The document body contains garbled text but also includes the URL that triggered the malicious redirector heuristic, suggesting it's part of the lure. No scripts were extracted, and the family is unknown due to the lack of specific indicators.

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://ttraff.ru/pify?keyword=cabal+mobile+wizard+guide In PDF document text
    • http://files.abridgedinvesting.com/uploads/1/3/2/6/132680808/dotegogodox-logudilabim.pdfIn PDF document text
    • http://files.kozaero.com/uploads/1/3/1/3/131379875/nifajajixe_xamofexarep_vofosaze_gebetufo.pdfIn PDF document text
    • http://files.roryfitzgeraldbledsoe.com/uploads/1/3/0/8/130874332/165242.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3000/3355/files/john_deere_z425_parts.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0255/2742/files/19356580817.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2885/7503/files/high_carbohydrate_foods_list.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8907/6117/files/ludizaxapesozaru.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1312/8863/files/bunyoro_kingdom.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6279/6186/files/funube.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7365/9290/files/46239871657.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4076/7132/files/mac_os_catalina_size.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1013/0073/files/nagekabilo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9612/9192/files/latest_boy_baby_names_in_tamil.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3214/9148/files/26893388674.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2741/4695/files/13673528692.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6109/2250/files/xubebirafopakuwov.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006844.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6844 4968 bytes
SHA-256: 626fccdbc45aa4e94546a3d7a661a21f96af6de6f23d059e3c641dbde6cf61c4
font_01_sfnt_off0000793a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x793A 1800 bytes
SHA-256: 51ebeec29509b87aa858d500e37ac8853184703d07d1f913ce36d8e1dc7764c0
font_02_sfnt_off000081c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x81C8 10648 bytes
SHA-256: 4e0ec1d0a45e15dbb8f37fa27a326af3551e73b750bb1fbd4eb0e80d55b0b24e
font_03_sfnt_off0000a634.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA634 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34