Malicious PDF — malware analysis report

Static analysis result for SHA-256 b4e53e3d1a9160b3…

MALICIOUS

PDF

71.1 KB Created: 2020-09-14 19:48:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 0f5757a5ca812cbbabbf581615ec0d28 SHA-1: 376d8f35899eb0b370979f9a7f3999fd2b189dc4 SHA-256: b4e53e3d1a9160b3f58c1e1f93d13b2d0a5894918359785b4f2fbf71589ad2cd
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains multiple embedded links, with one identified as a malicious redirector. The ML classifier strongly indicated maliciousness. The presence of a redirector suggests the document is part of a phishing or malware distribution chain, aiming to lure users to malicious content. No scripts were extracted, limiting the analysis of specific execution behaviors.

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.link/pify?keyword=holistic+guide+for+a+healthy+dog In PDF document text
    • http://files.evodiacreative.com/uploads/1/3/0/8/130815009/fuxugafok.pdfIn PDF document text
    • http://supiwon.the-nature-atelier.com/uploads/1/3/2/6/132682974/takotobabi.pdfIn PDF document text
    • http://files.williamsfamilyfarms-ms.com/uploads/1/3/0/8/130813799/rorefabam-kiresuwadototi-zawiliwopilowon-xileluni.pdfIn PDF document text
    • http://jikobazu.cloudsaflame.com/uploads/1/3/1/4/131407227/e3733b43.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static.usrfiles.com/ugd/c8df25_4c2e5575165346f4bb7832b9abd8bde2.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/1d5a3f_0bd6cf8907134a919c9296e17a89729a.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/8acad3_7ca5924542724575a6cc71e50c3dc896.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/decf6f_b88ec6e1e6424b7e937e3ff0be3796b3.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/85d67f_d745001ddd0c408d85658a68fb8e7f0e.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0319/0181/files/84993620081.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0460/7885/3284/files/calendar_2020_template_malaysia.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/2581/4936/files/95118494634.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6608/7838/files/zodufibegaratajuriviwog.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2470/1845/files/light_science_and_magic_5th_edition_free_download.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_off0000da13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA13 5348 bytes
SHA-256: c50f8a496670a18ab62b5a75bad4fbc7daa995927d1f08072bccfc1e02b38fa5
font_01_sfnt_off0000ec42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC42 10316 bytes
SHA-256: 2a6207db37dd4a7a19742fa5b4b54b9d5a82fbbae1e7a9faf9d1b1558c25b0ff

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