Malicious PDF — malware analysis report

Static analysis result for SHA-256 575dbfa7eaaecac0…

MALICIOUS

PDF

42.9 KB Created: 2020-08-08 00:48:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 597e0345aea116340b7c2cec2d050e2c SHA-1: e261af24baee7a27112594e398806197372c5e41 SHA-256: 575dbfa7eaaecac0524142b4162a4f2c6653adedbcd76ecbd8322e7cf1f2add0
194 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a primary link pointing to a known malicious redirector. The document body, though heavily obfuscated, suggests a lure for a 'free download' of an English speaking course, which is a common social engineering tactic. The presence of a malicious redirector indicates an attempt to lead the user to a compromised or malicious site.

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=super+fast+english+speaking+course+book+pdf+free+download In PDF document text
    • http://ladonif.castaiclakedragonboat.com/uploads/1/3/1/1/131164243/zojosupa.pdfIn PDF document text
    • http://toluwezas.kulaspirit.org/uploads/1/3/1/4/131437423/vagabe.pdfIn PDF document text
    • http://dipemit.fullmoonyogabirth.org/uploads/1/3/1/4/131407227/1393658.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/1/0431/6528/6564/files/22613427418.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8415/2986/files/77634335484.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2379/4337/files/5343926801.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2299/1007/files/cancer_genetics_book.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5035/3318/files/67721439082.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/7699/1653/files/jusufinesekerudinaka.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/banefidofekadozimodomi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3017/4113/files/digus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4393/6673/files/fupusufe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5032/8486/files/learn_esp32_with_arduino_ide_course.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 1

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_off00006690.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6690 5816 bytes
SHA-256: cca07a5a66a37ab9088a0d33dd64b6f99b161fb1966a5dbb8e8de612cf9c6679
font_01_sfnt_off00007a5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A5A 10600 bytes
SHA-256: 01538b953cf7c7eb3ac4b7458268d080b0bfd6a594cfbb2d3756d006c0b7c8c7

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