Malicious PDF — malware analysis report

Static analysis result for SHA-256 8da42402eada57e3…

MALICIOUS

PDF

31.4 KB Created: 2020-08-21 04:06:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: f8c94773fc89a5fe76c83ead6f94491c SHA-1: 7b07c4f916e42e566f18f90865a4bbc9ff9dd2be SHA-256: 8da42402eada57e30ed20680ce17f22eb5d1e007a9b8fda3b1fc79fcb140a221
194 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector. This suggests a link farm strategy to obscure the ultimate malicious destination. The ML classifier also strongly indicated maliciousness. No scripts were extracted, but the PDF structure and embedded URLs are sufficient to infer a malicious intent focused on redirection.

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=bike+mania+hill+race+game In PDF document text
    • http://bomowaxi.enlightensatori.com/uploads/1/3/1/8/131857631/242fad9.pdfIn PDF document text
    • http://files.lifted-queens.com/uploads/1/3/2/8/132814272/wumita.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/1/0430/6229/6725/files/56923992428.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3192/8740/files/ccloud_tv_guide_epg.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5670/1346/files/go_with_microsoft_office_2020_volume_1.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7754/2823/files/23070116010.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5575/9011/files/65302718809.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0453/3600/2715/files/meteora_greece_tourist_information.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/97897646990.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4373/4172/files/55064248313.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1908/3677/files/sapupuvibavivutirefi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3504/1693/files/39436698488.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_off000040ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x40EA 5148 bytes
SHA-256: 6a4ea642cd9d0f29d7dd167481322eb7c729b08c3bcfba366bb814d93c6a6854
font_01_sfnt_off00005233.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5233 9024 bytes
SHA-256: a211bf811049adb385079e630714197f7142e1f70bcce9286e0eca41dbeadee7

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