Malicious PDF — malware analysis report

Static analysis result for SHA-256 25aea79aae463dca…

MALICIOUS

PDF

38.3 KB Created: 2020-08-08 02:59:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 654310b2326ebcae818e15c3e41ef705 SHA-1: c47454328958da382d3ae7006b795227a399a646 SHA-256: 25aea79aae463dcac2fa604a570fb1570e5c78ca4ddbca5aae459406a3dfc4f6
194 Risk Score

Malware Insights

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

The PDF file contains embedded links that redirect to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains a URL that appears to be a lure for 'computer networking notes pdf'. The PDF_SEO_LINK_FARM heuristic suggests a large number of external links were generated, likely for SEO manipulation to increase visibility of the malicious content. No scripts were extracted from this sample.

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=computer%20networking%20notes%20pdf In PDF document text
    • http://files.souderlandscaping.com/uploads/1/3/1/4/131437755/6069427.pdfIn PDF document text
    • http://vejafuwa.terraformidable.com/uploads/1/3/1/4/131409090/topowage.pdfIn PDF document text
    • http://files.brjcdac.org/uploads/1/3/1/6/131607005/zagojof.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/1/0430/9562/1796/files/vexotazivukajudiku.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7090/5750/files/puxowozujeremorage.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6946/4991/files/32998120905.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9671/1073/files/benefits_of_agroforestry_practices.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6495/0938/files/66136603148.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4973/8650/files/pubebogodaxoxozudogib.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5830/6965/files/24936860345.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8443/2038/files/advanced_java_objective_type_questions_and_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7133/2767/files/66226907589.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8511/0175/files/5110924296.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 6

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_off00005981.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5981 5180 bytes
SHA-256: 5257e42b69a42ce44be5c814521a46ae78d96ae1e671369123a1c4ce393301b0
font_01_sfnt_off00006b24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B24 9796 bytes
SHA-256: f728e404903c64308360ffa90218788ae720b91db974902cf9e12879081cd03b

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