Malicious PDF — malware analysis report

Static analysis result for SHA-256 eef403ba134f6c7b…

MALICIOUS

PDF

42.6 KB Created: 2020-08-12 12:05:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 2cd8468a5e8c80a82b39bad15022bf02 SHA-1: 758c7ce5d152bbbad99f9bfad748bbb273bc6a7c SHA-256: eef403ba134f6c7bdb5e4f0780812f6770dc511c8e26ee8a28211682f9e85474
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a link farm disguised as research papers, with the primary link directing to a known malicious redirector. The ML classifier also strongly indicated maliciousness. The document body, though partially corrupted, contains text related to 'methods of data analysis' and the wkhtmltopdf tool, suggesting a lure to download further malicious content.

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.com/pify?keyword=methods+of+data+analysis+in+quantitative+research+pdf In PDF document text
    • http://files.redmountaincommunity.com/uploads/1/3/2/6/132681670/7041394.pdfIn PDF document text
    • http://files.englishmadeeasy.es/uploads/1/3/1/6/131637226/3936f482d93ea.pdfIn PDF document text
    • http://vipado.rootsquaredphotography.com/uploads/1/3/2/8/132814194/141d217.pdfIn PDF document text
    • http://files.dyanetwork.org/uploads/1/3/0/7/130739883/7998461.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/1/0430/9565/4554/files/vibinireloxevivuvelurepit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9128/7461/files/74277030419.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2701/2507/files/bohemian_rhapsody_partitura_piano_completa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6525/2771/files/mario_benedetti_corazon_coraza.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0684/4315/files/bulavup.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0449/4403/1899/files/free_to_word_converter_software_download_full_version.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8119/5927/files/xaxufitoxixesuxite.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1243/1776/files/vevasatoginosijam.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0447/6734/6839/files/english_questions_for_conversation.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 3

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_off000066c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66C5 5536 bytes
SHA-256: c22b4f134fdb82bb77a55df87d0161428ae80542a81e19c5b549fc98caa82f02
font_01_sfnt_off000079a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x79A9 9952 bytes
SHA-256: b3be5c9a62e08ffb4a3bcb535c9a86e9cf5f3e295ae0f31d96e8cf5f8db210de

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