Malicious PDF — malware analysis report

Static analysis result for SHA-256 f262330cd7a8a875…

MALICIOUS

PDF

44.4 KB Created: 2020-08-20 05:58:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: c8139e0d7907013805b1248e817d7645 SHA-1: c7359a7df11b5a114ac690cf8b0d3bef223e0401 SHA-256: f262330cd7a8a8753a08fa7eb43e47acf7f8dec86a24ab8c31f61dca61613c2d
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1200 Hardware Addends

The PDF was flagged as malicious due to a high number of embedded external links, many of which lead to a known malicious redirector. The document body contains text related to 'Catholic magisterium pdf' and includes the malicious URL, suggesting a lure to trick users into clicking potentially harmful links. The ML classifier also strongly indicated maliciousness.

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=catholic+magisterium+pdf In PDF document text
    • http://files.putinbaygardenclub.com/uploads/1/3/1/3/131379296/b978b6331c.pdfIn PDF document text
    • http://files.grettaharleymusic.com/uploads/1/3/2/8/132814071/rudisopadofakelu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6815/3253/files/jilozuriwezexokodubejun.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4281/5643/files/65056391812.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4704/2715/files/contemporary_social_and_sociological_theory.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5857/7046/files/satimezulevoremowozinize.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8799/4792/files/72801830797.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3431/1845/files/53446463789.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5540/7511/files/263700497.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4914/8838/files/5687355464.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9776/0668/files/supercritical_boiler_operation.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1576/6177/files/laboratory_apparatus_worksheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9825/1165/files/99391396261.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006247.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6247 5368 bytes
SHA-256: 92eff004d20d672ea1387292a953b8449bb48fb76c8ebe2dde05895f7ef255d8
font_01_sfnt_off0000748a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x748A 9996 bytes
SHA-256: d693124c92dfdd775c9f0d5336941f315834a4fcae7b350c4cf717a4db230750
font_02_sfnt_off000096b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x96B1 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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