Malicious PDF — malware analysis report

Static analysis result for SHA-256 546bf6e117cad3d7…

MALICIOUS

PDF

40.0 KB Created: 2020-08-07 22:58:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 371e884e5cb003169c0364c6868b8ab4 SHA-1: 36ccc0f420d7af82a57768599cc5e0782c30dabb SHA-256: 546bf6e117cad3d76ef66316ebbc67398f9f1aa6b22e98055236991be87d80b2
202 Risk Score

Malware Insights

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

The PDF contains a link farm and a malicious redirector URL, indicating an attempt to lure users to malicious content. The presence of a 'download button' heuristic further supports this attack pattern. The document body, though heavily obfuscated, contains the malicious redirector URL and several other potentially malicious PDF links, suggesting a delivery mechanism for further payloads.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=anatomy+and+physiology+coloring+workbook+pdf+chapter+5 In PDF document text
    • http://files.zevkali.com/uploads/1/3/1/4/131454355/eb8fb6dd15b0b6.pdfIn PDF document text
    • http://files.xonoil.com/uploads/1/3/1/4/131438018/878331.pdfIn PDF document text
    • http://fifasazo.jessicacontrera.com/uploads/1/3/1/0/131070581/1112499.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/1/0437/1608/3877/files/24518068883.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6885/8280/files/89467272967.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0842/6147/files/lezipunekekegoxavenagixem.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3551/7337/files/66039460490.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1416/8480/files/56570243124.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9875/1641/files/exception_hierarchy_in_java.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4433/8854/files/laxobujarutasikegu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6725/1617/files/16029338785.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0822/0574/files/popukapuz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3826/0899/files/puxazuvexebuvog.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1126/7990/files/volubaviwokivarerufew.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2328/6940/files/fugamovawexodakoxalokabem.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0854/0324/files/xefejizakovaf.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 5

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_off00005b9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B9B 6080 bytes
SHA-256: bdb4de2afff5792f2ceeb7664101c63d5807828d8da7549837b91a673a2d1ce1
font_01_sfnt_off00007040.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7040 10092 bytes
SHA-256: a2e3cf224c020588e0d3eb39aa4a66660e1a7a813d5c5b0bb2f437739fd80874

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