Malicious PDF — malware analysis report

Static analysis result for SHA-256 15543c943f27d2ce…

MALICIOUS

PDF

42.2 KB Created: 2020-08-05 17:27:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 989fb1575907c2c738717e3f759836d0 SHA-1: e45faa7b8f41e9f73eb8c823cafb373a3ff09a12 SHA-256: 15543c943f27d2ced805ee097c91065249bc43cd23ec8c70da91f1b765b9a834
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links, many pointing to a redirector service, suggesting a link farm or SEO manipulation tactic to drive traffic to malicious sites. The document body, though heavily obfuscated, contains URLs that are part of this redirection scheme. The primary malicious URL identified is a redirector designed to lead users to potentially harmful content.

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.cc/pify?keyword=algebra+word+problems+worksheets+pdf In PDF document text
    • http://kidexagi.drcaricannon.com/uploads/1/3/1/6/131636612/2137948.pdfIn PDF document text
    • http://files.barbararussellcatering.ie/uploads/1/3/0/8/130874110/rejal.pdfIn PDF document text
    • http://files.gardensofelegance.com/uploads/1/3/0/8/130814717/8179063.pdfIn PDF document text
    • http://files.spiritualfringe.com/uploads/1/3/1/8/131856435/xizosutomenij.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/1/0436/6827/5353/files/dagigewez.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1645/3272/files/pilaberotigijutol.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8063/7859/files/jomizipotevewodineluw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0083/9842/files/jugagis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5921/6537/files/32732525175.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0319/9133/files/41064961236.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3031/4133/files/ridovamarivuxege.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0514/7298/files/black_and_decker_grass_trimmer.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2174/6847/files/zofusubej.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8323/5489/files/76538648667.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_off0000643b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x643B 5740 bytes
SHA-256: 74dd67aae371bd7806fe57ed8f0a49b2825f9a14866eff58a155dac6b4d4852c
font_01_sfnt_off000077ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x77AC 10816 bytes
SHA-256: f611e35db57c1e3f96d4f7e351ca96b42d44bdbb19a4a803dfc45c73ad3c778c

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