Malicious PDF — malware analysis report

Static analysis result for SHA-256 25a17fea9a7d318b…

MALICIOUS

PDF

39.9 KB Created: 2020-08-12 15:03:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 5ad5f3e2222325199628d2f2e2cb7927 SHA-1: e78624f7d3b6da46beee05d06224b21e99a3ec47 SHA-256: 25a17fea9a7d318b0e1655e185cd556b1cdb76e4018e321f8baae8a9866f2eab
194 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing indicating it is a malicious redirector link, pointing to `https://ttraff.com/wb?keyword=bradycardia%20guidelines%20pdf`. This URL is embedded within the document body, suggesting a social engineering lure to trick the user into clicking it. The file also exhibits characteristics of a link farm, with numerous embedded URLs, many pointing to Shopify domains, likely to obscure the malicious redirector. 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.com/wb?keyword=bradycardia%20guidelines%20pdf In PDF document text
    • http://kitor.psychodrama-sociometry.com/uploads/1/3/1/6/131606255/kijolav.pdfIn PDF document text
    • http://files.ukchristianparty.org/uploads/1/3/1/8/131856883/49a48a50b7.pdfIn PDF document text
    • http://files.alexbowlerevangelism.com/uploads/1/3/0/8/130873872/mumowe.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/1/0428/1139/2167/files/38702353163.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4213/6476/files/canales_de_comunicacion_electronica.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3071/6326/files/5909116301.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1657/6424/files/37010883024.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/85583151980.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2639/0951/files/58081643864.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1947/6896/files/zurozabomuxagukilipim.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3431/9776/files/romoze.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0936/7454/files/juzip.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8005/5974/files/77963834442.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2998/7489/files/bawinozejujel.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/8711/6965/files/pdf_to_word_converter_free_download_for_android_mobile.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_off00005d6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D6C 5476 bytes
SHA-256: 511d360ea5e339b549715683ae52dea3fcaa73267e87f604f12d9ed1cfdbf47b
font_01_sfnt_off00007022.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7022 10256 bytes
SHA-256: 977b428f7f8651fa64cb388dc6f0237d6e827cce0684a32f2912cf43d0c5bbe3

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