Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ad3eacf84cf0142…

MALICIOUS

PDF

41.0 KB Created: 2020-08-24 19:49:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 44eb23afad9c12bffa8da4cf77c2a59a SHA-1: 15876aae71479acfa7c0778ccda5994aedaba668 SHA-256: 2ad3eacf84cf01420a515b1d3d3803550ba1207744c61bdf02e4332444063ce0
194 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to a redirector service. The primary malicious URL identified is https://ttraff.cc/pify?keyword=basic+electrocardiography+pdf, which is flagged as a malicious redirector. The document body, though heavily obfuscated, contains references to PDF files and the malicious URL, suggesting a lure to download or access content that ultimately leads to malicious infrastructure. No scripts were extracted from this sample.

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.cc/pify?keyword=basic+electrocardiography+pdf In PDF document text
    • http://files.engforu.com/uploads/1/3/0/9/130969001/rujuki.pdfIn PDF document text
    • http://files.secondchancedogrescueofiowa.com/uploads/1/3/2/7/132741476/4347522.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/1/0431/4929/5776/files/programming_in_ansi_c_7th.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9390/8887/files/fast_and_the_furious_tokyo_drift_torrent.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1921/4758/files/rivatesojelijijademaw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3396/8287/files/skf_ball_bearing_catalog_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0464/6364/7912/files/quiznos_nutritional_information_canada.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5702/0056/files/information_memorandum_template_real_estate.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/1878/6728/files/wesawagam.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1009/7313/files/8617036242.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/5254/5701/files/sovulesawuk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0450/2038/1342/files/25347605943.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/3150/9664/files/jewelry_design_templates.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 2

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_off000062d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62D6 5568 bytes
SHA-256: 242e30d72e422c5ff39a0d2d2b454334eeb813fce96c5f43a2100fd2d5bc7c2f
font_01_sfnt_off000075b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x75B7 9812 bytes
SHA-256: 28549427bba882908c61242a0e7d26f043a6cfb4a322376370b78cb211bf02fb

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