Malicious PDF — malware analysis report

Static analysis result for SHA-256 c100c4f8f43174d5…

MALICIOUS

PDF

45.0 KB Created: 2020-08-14 11:12:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 2f9963ecf3c3db360307c587fff846af SHA-1: 0fa647478cda71b13e9aaf12bd510a4f431dc792 SHA-256: c100c4f8f43174d50b7a2a6829e0228f7145daf68d24abce8b7f63dc31eb9b46
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a link farm hosted on cdn.shopify.com. One critical heuristic identified a link to known malicious redirector infrastructure at https://ttraff.ru/pify?keyword=esquire+uk+christmas+gift+guide. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains the same redirector URL, suggesting a lure to a malicious site disguised as a gift guide.

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=esquire+uk+christmas+gift+guide In PDF document text
    • http://guwara.imperialgrp.com/uploads/1/3/0/7/130776213/desubupufow_lugakuxixa.pdfIn PDF document text
    • http://files.appletreecontractors.com/uploads/1/3/1/6/131607712/9709263.pdfIn PDF document text
    • http://files.fuelbarhealth.com/uploads/1/3/1/0/131071056/8851286.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/1/0431/7180/7391/files/ruwafubipew.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4219/4083/files/dajefugidilepiposeko.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9975/8498/files/and_but_so_worksheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6073/1803/files/57362451654.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0110/1984/files/rudram_namakam_telugu_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0469/0581/files/65947764313.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6654/6583/files/37672743861.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/lojuxefututa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1753/3597/files/21416620975.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3488/5796/files/tsp_70_form.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6989/8913/files/precalculus_with_limits_3e_chapter_6.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4097/1674/files/perupulubapumiri.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2340/8032/files/goxazonew.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_off00006feb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6FEB 5548 bytes
SHA-256: 7a043359497177618a8163226c5cab9633af4492cc848aa0077bbd37071222b2
font_01_sfnt_off0000829d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x829D 10700 bytes
SHA-256: dd1775c320aca3fbb40b69d4025ef60d4d514079bd7e1c9cd9be639eda2d59c0

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