Malicious PDF — malware analysis report

Static analysis result for SHA-256 000fc003f8ba33ca…

MALICIOUS

PDF

34.0 KB Created: 2020-08-11 23:33:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 5450a365ad7e873bea979462dc7a21b7 SHA-1: c5120e198f69b28bb05c990d29947ae4f950d19d SHA-256: 000fc003f8ba33cae65b5670f02eb49d48cac8e1e5499091fa26c2aa290a3acc
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links designed to appear as educational content but redirect to a malicious URL. The ML classifier strongly indicated maliciousness, and heuristics identified the document as a redirector and part of a link farm. The primary malicious IOC is the redirector URL, which is likely used to host or distribute further malicious content.

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.ru/wb?keyword=subordinate%20conjunctions%20worksheet%20year%202 In PDF document text
    • http://files.redrootswrestlingclub.org/uploads/1/3/1/4/131407802/a6d316f8086eeec.pdfIn PDF document text
    • http://files.exploremuncie.org/uploads/1/3/0/8/130813804/605509.pdfIn PDF document text
    • http://files.graceub.com/uploads/1/3/2/6/132681404/6733747.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/1/0434/3965/3030/files/los_4_acuerdos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6482/8838/files/48839871465.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4233/3084/files/rixovazenadugiragake.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7248/6564/files/download_august_alsina_testimony.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2163/0631/files/fidemoso.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3455/0177/files/kisadagufukebewobikinaru.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/4532/8808/files/66306901308.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9925/0072/files/27488518229.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/0027/2792/files/75581649116.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6662/2105/files/pokepilo.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 8

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_off000045ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x45CE 5704 bytes
SHA-256: a543ee787c7a7ab29140d0086407db2b994b69b0fe0dd261f30b3b3e2822e2a0
font_01_sfnt_off00005944.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5944 9868 bytes
SHA-256: 7271746b932826b562f320e75fc18d3b712d3d2a338f635612ad2bd13f1bced0

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