Malicious PDF — malware analysis report

Static analysis result for SHA-256 d359bc11c2cc5125…

MALICIOUS

PDF

50.8 KB Created: 2020-07-31 11:29:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 163406c5eb235c6208ff39e0ae6bb64c SHA-1: f3f04e0b680b154233fc0e4245f438c07ab6bc40 SHA-256: d359bc11c2cc512566244b9d97bd7b2d992ca6033a0cab814d32c2e60ccb33be
234 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with a critical heuristic identifying a link to a known malicious redirector. Another heuristic indicates the document is a lure for a password-protected archive, suggesting a multi-stage attack. The document body is heavily obfuscated but contains metadata related to PDF annotation and the authoring application, which is not directly indicative of malicious intent but supports the PDF context.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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=annotate+pdf+ibooks+ipad In PDF document text
    • http://files.davidjonesdialogues.com/uploads/1/3/0/8/130874585/429e128d8d683.pdfIn PDF document text
    • http://files.bdwponds.org/uploads/1/3/1/3/131384121/fowexutorebal.pdfIn PDF document text
    • http://files.santaclaritaschool.org/uploads/1/3/1/4/131437308/9471656.pdfIn PDF document text
    • http://files.nnhst2.org/uploads/1/3/1/3/131379612/lufuxofuwusuwufaposi.pdfIn PDF document text
    • http://files.ifca.co/uploads/1/3/2/7/132710694/cb21c105724.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/1/0428/9835/8432/files/93527538138.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1411/1903/files/10490838045.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/79265304831.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0488/6166/files/60499362598.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8389/0850/files/doponuxamumosirelubamexum.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9508/9571/files/11198137182.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5366/2883/files/25626173677.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/1479/7981/files/mizofu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4303/6053/files/zukexuxukobufuwuvu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9594/8454/files/texule.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/61086590007.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1541/3658/files/nisokaruw.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_off00008a4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A4C 4888 bytes
SHA-256: e95e5a373c2127366996e2647947e8ab920d222da69abc4ac82bc071e410d5cc
font_01_sfnt_off00009af4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9AF4 10384 bytes
SHA-256: 29a630dc821a66e6f38d361c13ea305bfdb2bf3b34bcfdae3bdd643c60c7353d

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