Malicious PDF — malware analysis report

Static analysis result for SHA-256 2024bbb0667eefdc…

MALICIOUS

PDF

36.5 KB Created: 2020-08-22 01:09:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: cab602b96a5138890121a87cfd4ea71a SHA-1: 9e7ac820b4dbd067227cc1f4ff4ded128401c985 SHA-256: 2024bbb0667eefdc9742f50027012b61df4239efef7856fa08580cb134b43ab9
194 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with one URL pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the string 'Cambridge fce use of english pdf' and the malicious URL, suggesting a lure. The presence of numerous PDF links, many hosted on Shopify, indicates an attempt to create a link farm for SEO poisoning or to distribute malicious content. The ML classifier also 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.cc/pify?keyword=cambridge+fce+use+of+english+pdf In PDF document text
    • http://files.chads-w.com/uploads/1/3/1/3/131398253/9dd680a8f.pdfIn PDF document text
    • http://rezoxor.bensonbuffstreator.com/uploads/1/3/0/7/130776167/130727.pdfIn PDF document text
    • http://wifin.rabbitresidence.org.uk/uploads/1/3/1/4/131406717/sibezakekegipip.pdfIn PDF document text
    • http://files.kaseimart.com/uploads/1/3/0/9/130969525/5dee16.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/1/0431/3815/4653/files/8262132220.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3477/1610/files/gigabyte_motherboard_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0653/3525/files/55123891328.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8152/1560/files/53915640501.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/5013/7760/files/53870503169.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3142/0319/files/emotional_quotient_inventory_test_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5082/6919/files/arabidopsis_thaliana_as_model_organism.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3932/4325/files/cycling_jersey_template.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_off0000504a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x504A 5612 bytes
SHA-256: b9a87f4258d8df7bd4cfeb2085697603736324696b7d783750bf28b675b3c059
font_01_sfnt_off0000632e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x632E 9988 bytes
SHA-256: 76fd432db47f3e3ce4f4095f6921cc2071abef1fac4fcce7c41f92c7dca25a97

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