Malicious PDF — malware analysis report

Static analysis result for SHA-256 747ab5299f9788c6…

MALICIOUS

PDF

41.2 KB Created: 2020-08-20 13:41:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 3d453b193ddcb85cdbeae8473b48ada4 SHA-1: 96c2f7d8a580339ced4acd48d9fb22533896c9c2 SHA-256: 747ab5299f9788c6f935d09f293b9b0af5ef525b8e868557a2f3a9b55037ac8e
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm designed to appear as legitimate search results, leading to a redirector URL. This redirector is then used to funnel victims to a malicious site, likely for phishing or malware distribution. The ML classifier strongly indicated maliciousness, and the presence of multiple SEO-optimized PDF links further supports a malicious intent.

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=crystal+reports+in+c.+net+windows+application In PDF document text
    • http://files.isleypercussion.com/uploads/1/3/1/3/131398605/acca3ef.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/1/0433/0458/3318/files/98710439479.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8716/7645/files/22086511290.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5031/9528/files/biot_savart_law_examples.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8118/6971/files/dakibodeb.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9524/5475/files/fenaresupesik.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7885/2507/files/48694603823.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0872/1049/files/vifetobotut.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0453/8567/9016/files/to_be_present_simple_test.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0447/7173/7749/files/1809673304.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mulobovapu.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_off00006472.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6472 5196 bytes
SHA-256: ed54f3c63d7703971e3202c5ce5e2566769e220410ae6fe47da317026d304785
font_01_sfnt_off0000763e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x763E 9908 bytes
SHA-256: 4bd68107684e0bb75e16dbda3475fe0940a1c04ffe4630882e11792660209041

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