Malicious PDF — malware analysis report

Static analysis result for SHA-256 2cdba70c9652e8ee…

MALICIOUS

PDF

50.2 KB Created: 2020-07-30 02:52:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 621e9241d81dfbb8918c1a9fd04d8a99 SHA-1: 40168c457c35b334b5e21ee8405f2d07318b2ccd SHA-256: 2cdba70c9652e8ee21e4362b46f11f5dcbad8f1a67d5eb899081b0c5493d1a7c
194 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to SEO-optimized PDF documents hosted on Shopify. One critical heuristic indicates a malicious redirector link, specifically 'https://ttraff.cc/pify?keyword=guideline+atrial+fibrillation+pdf', suggesting the document is designed to redirect users to malicious content. The document body, though heavily obfuscated, contains text related to 'Guideline atrial fibrillation pdf', reinforcing the lure.

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=guideline+atrial+fibrillation+pdf In PDF document text
    • http://files.guidelinefit.com/uploads/1/3/0/8/130874633/fepawagusirovo_lezazezorerurej.pdfIn PDF document text
    • http://files.trinityfarmnwf.com/uploads/1/3/2/8/132816202/vavelaw-waxaxusizoludu-suxeruwugesotot.pdfIn PDF document text
    • http://files.onyxsgreatadventure.org/uploads/1/3/1/3/131380177/fomorupizisikawe.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/1/0432/1227/5870/files/43127855922.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/3458/0891/files/47546535354.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0290/4222/files/15841425870.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8363/6644/files/44308134077.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5715/1142/files/72083033239.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7220/0605/files/ronamunux.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6570/3590/files/2167166783.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4489/6925/files/13087443605.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0804/0853/files/poxenapuxupurekoxekin.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6534/3138/files/93816457284.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_off00008868.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8868 4912 bytes
SHA-256: f2a105fc937c356144cdd4ed0581906bde29094158c6ab6f44d2364031173aee
font_01_sfnt_off00009918.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9918 10192 bytes
SHA-256: 1bbf7ad4e94c3c85e8f3995da6e91512727a871612b3ea6d0ea0c0f1388e84dc

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