Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ca17b1904b2da8c…

MALICIOUS

PDF

49.1 KB Created: 2020-07-31 07:01:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 42b4769b4c217c2a19be7b2121dcb20e SHA-1: ce921039d74602c9430c3c0551f30f85f7c64351 SHA-256: 0ca17b1904b2da8c2ee69ea86a0a3c5764a1d2ebb5b99e2fe37db0604155052b
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic identifying it as a redirector to known malicious infrastructure. The document body, though heavily obfuscated, contains text related to 'Magisterium 5 pdf ita' and references wkhtmltopdf, suggesting a lure for potentially sensitive information or further malicious content. The presence of multiple SEO-linked PDFs and a critical ML classification further support its malicious nature.

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.ru/pify?keyword=magisterium+5+pdf+ita In PDF document text
    • http://files.activeinitiatives.com/uploads/1/3/2/6/132695569/740742.pdfIn PDF document text
    • http://files.redpetalsmedspa.com/uploads/1/3/1/3/131398085/zevedabakumusawoj.pdfIn PDF document text
    • http://files.unitedwayofpc.org/uploads/1/3/1/3/131379608/zamiketofatoxo_worironez.pdfIn PDF document text
    • http://files.millvalleychickens.com/uploads/1/3/0/7/130739340/5180252.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/1/0428/1679/8883/files/rovulirosuvoj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5161/3336/files/2652276543.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3976/9254/files/wolelopezowen.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0892/5602/files/riwegulesejenavinumadediw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7165/9414/files/19815590122.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6354/8831/files/kilujilosem.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5108/0090/files/61916873573.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7792/7072/files/61170209935.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7485/4820/files/pafoguloz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4986/8703/files/38532612786.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1824/8601/files/44721932581.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 4

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_off00008461.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8461 5124 bytes
SHA-256: f1a1ba8b1648f5c560e0e6f0dce992341312d6cdce814a01fc67040ad668f1ed
font_01_sfnt_off000095d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x95D5 9816 bytes
SHA-256: 2d661c67d8ccaf601fd2241282d4276a6e522730a51a0056573b8ab3f8b5f9df

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