Malicious PDF — malware analysis report

Static analysis result for SHA-256 88ebba4c6e11d043…

MALICIOUS

PDF

42.2 KB Created: 2020-08-20 00:26:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: d6c6f58d7fffbba61dacd757c42205f7 SHA-1: 565d512bf82a78980aa0e60d562c739c592d987d SHA-256: 88ebba4c6e11d0433c25e53cbb43d6de5e93ad0468ad5516607d0fb661ba2b78
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to a redirector service, suggesting a link farm or phishing attempt. The primary malicious link, https://ttraff.ru/pify?keyword=epileptiform+activity+in+the+brain, is identified as a known malicious redirector. The document body, though heavily obfuscated, contains this URL, reinforcing its role in directing users to potentially harmful content. The ML classifier also strongly indicated maliciousness.

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=epileptiform+activity+in+the+brain In PDF document text
    • http://files.argumentcritique.com/uploads/1/3/1/3/131398212/889ee5bbeaa317.pdfIn PDF document text
    • http://files.olsyouth.com/uploads/1/3/1/4/131453588/7916754.pdfIn PDF document text
    • http://kunupunus.rescuedfirewood.com/uploads/1/3/1/3/131383541/3829052.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/1/0440/5755/9190/files/esab_mig_master_250.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/6629/2389/files/84613252923.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1596/1762/files/82638884448.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9615/2995/files/data_structures_and_algorithms_in_python_wiley.pdfIn PDF document text
    • http://files.mkumar.people.ua.edu/uploads/1/3/1/4/131437984/kaxogodevusume.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4272/5275/files/sample_sale_los_angeles_2016.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7527/2855/files/file_bitmap_gratis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7405/2503/files/64263636803.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6382/6849/files/6626432280.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0765/4563/files/ludekaziwedilulejikusibez.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6450/0122/files/jadasiwofuvebuxaloleruxid.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006798.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6798 5336 bytes
SHA-256: b369ed81f8b40b765478736817fb9a8ce5a24a8b2b475429ad5672a23e83ecf5
font_01_sfnt_off000079a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x79A2 10060 bytes
SHA-256: 34180fb018b4286aecc864c0d8e2a014546c0cd0e78ea2fc7bf9e593ee567805

Open this report in the interactive analyzer, or submit your own file for analysis.