Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed660a2a2715767c…

MALICIOUS

PDF

48.2 KB Created: 2020-08-21 17:41:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: ef680032ae4673b3e1e3c0d108f39197 SHA-1: 3faabc62b24618f94190059e03007e11075d6015 SHA-256: ed660a2a2715767c853edb29036c694b94e218111b30d7f82bb08cafe79fb29c
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a mass of external links, many pointing to Shopify-hosted PDFs, and one critical link to a known malicious redirector at ttraff.com. The document body, though heavily obfuscated, contains the text '12 hsc biology textbook pdf' and the malicious URL, suggesting a lure to trick users into downloading potentially harmful content. The ML classifier strongly indicated maliciousness.

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=12+hsc+biology+textbook+pdf In PDF document text
    • http://files.cornerstonepie.com/uploads/1/3/1/3/131398184/zetepamoj_safozixe.pdfIn PDF document text
    • http://files.firebirdbrewing.com/uploads/1/3/1/4/131437378/9780851.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8721/6293/files/mesutegufesulefuni.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0644/3163/files/97402642352.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7921/2959/files/69303458590.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5594/6655/files/57691233731.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1227/5876/files/57251334944.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/8714/8709/files/vawamu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6065/8330/files/gimitowizabinap.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8249/7701/files/2942053594.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/0214/8510/files/css_center_button.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000071a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x71A7 5256 bytes
SHA-256: 74021568cf4204231ea13142bf00812989e83ab72683b700733265d30d96101f
font_01_sfnt_off0000839c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x839C 10008 bytes
SHA-256: 99bca359efd2e55fe1a36cebae75bb63f980a4bdd4d96fc9f3f577b991de170a
font_02_sfnt_off0000a5e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA5E6 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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