Malicious PDF — malware analysis report

Static analysis result for SHA-256 28e154b95774de5e…

MALICIOUS

PDF

33.4 KB Created: 2020-08-03 14:03:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 91ff031bbf55a3a78b3e860e916d514c SHA-1: d8ceff58c148c8e6ab3523b5a0e9c4719084551d SHA-256: 28e154b95774de5ef3930226a6c363b751b8d4c8a67dd44bf338bb5234e9b103
194 Risk Score

Malware Insights

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

The PDF contains a link that redirects to a malicious URL, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains text related to a PDF download and the malicious URL itself. The PDF_SEO_LINK_FARM heuristic suggests the document is part of a larger link farm designed to attract traffic.

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=vehicle+dynamics+theory+and+application+pdf+free+download In PDF document text
    • http://files.piecemakersquiltshop.com/uploads/1/3/1/3/131383541/jitomi.pdfIn PDF document text
    • http://files.chasteensadorabulls.com/uploads/1/3/0/7/130776433/walefuzede.pdfIn PDF document text
    • http://files.hermannvetclinic.com/uploads/1/3/1/0/131070911/mutuxum-wirixulo.pdfIn PDF document text
    • http://files.earthsideholistic.com/uploads/1/3/0/8/130874050/fuzuzu.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/1/0430/0891/7657/files/97423217482.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3765/4178/files/jazizulepa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5725/8401/files/jikomajijafizo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2438/4154/files/gewuxux.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3349/1606/files/liberojezemiko.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0794/2549/files/javixivajegakagumo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5912/5160/files/41890460589.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/9378/4728/files/561692385.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7247/1715/files/mogifivusiwisu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0670/5311/files/nedejutolisemus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0933/5715/files/vazixugegulesedenaduzex.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_off00004666.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4666 5556 bytes
SHA-256: f2dc161e30b16feac5a429b546519f29689bd992d11c62b034c0a89162a8bf87
font_01_sfnt_off0000593a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x593A 9156 bytes
SHA-256: fc38ff190a10cd69f3319cb2ae683e5cdaa97b7cbb54f511842bf9996cfc823f

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