Malicious PDF — malware analysis report

Static analysis result for SHA-256 95fc53c64980220f…

MALICIOUS

PDF

69.4 KB Created: 2020-08-15 23:33:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 2667395554bf49d81628e302ecbda90e SHA-1: 13f37f8a26c93d9b7fa448756bcc67511bd5bf31 SHA-256: 95fc53c64980220fd6a501e594a3779ccaeb2cdde77fdb6328345ebe23476c8e
194 Risk Score

Malware Insights

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

The PDF contains a link that redirects to a malicious URL, disguised as educational content. The ML classifier strongly indicates maliciousness. The embedded URL is part of a link farm, suggesting an attempt to game search engines for traffic to malicious sites.

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=trigonometry%20worksheet%20grade%209%20pdf In PDF document text
    • http://files.napervilleroofingrepair.com/uploads/1/3/1/6/131606807/a55596df1b782a4.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/1/0427/4031/8375/files/diablo_3_unicorn_level.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0301/7373/files/dynamics_of_machinery_anna_university_question_papers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8343/2096/files/21884057929.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2019/7789/files/handbook_of_modern_bakery_products.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6717/9162/files/estrategias_de_marketing.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/7747/4206/files/lefodelaresukadititisedor.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2920/8992/files/54751639049.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4628/1122/files/36918239035.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/6912/6309/files/kubetejosivadesawodo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0236/3045/files/39288164581.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6621/2003/files/76059889196.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9802/1793/files/dogibutufeguxabupobari.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d32d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD32D 5784 bytes
SHA-256: 4dad373337cd38835c009ffc080910075dc82d5133011cece135d7cdee58a2da
font_01_sfnt_off0000e6c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6C5 9948 bytes
SHA-256: 465408a47316132e3e6571d4296051e9503a419666800b2f6e682b855c1c0158

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