Malicious PDF — malware analysis report

Static analysis result for SHA-256 1817b082c4baf31b…

MALICIOUS

PDF

47.4 KB Created: 2020-08-13 22:19:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 7e55fe1b4e721f42ff0c6b8097a290d8 SHA-1: 9f5be7fa441c3151cdde83bc061c8ff68473da54 SHA-256: 1817b082c4baf31b72e2bb3918938b249624e32cd9589fe62503a6bd4660c112
194 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to known malicious infrastructure, specifically a redirector designed for SEO phishing. The document body, though heavily obfuscated, contains text related to a 'printable pdf' and a URL that is part of a link farm. The ML classifier also strongly indicated maliciousness. The primary attack vector appears to be luring users to click a malicious link under the guise of a useful document.

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=blank+july+2019+calendar+printable+pdf In PDF document text
    • http://files.martijoyoga.com/uploads/1/3/2/3/132303382/86466b8fc.pdfIn PDF document text
    • http://files.ogphotography1.com/uploads/1/3/1/4/131406717/f44a76fca47.pdfIn PDF document text
    • http://zenum.erningscebulechon.com/uploads/1/3/1/4/131482976/4a5791d.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/1/0433/0687/7080/files/31240515614.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2969/9482/files/bobcat_331_specs.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3209/2573/files/algebra_booleana_teoremas_y_postulados.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3108/4708/files/89083118822.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6670/3516/files/labegivasoxemi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7529/7689/files/31741376959.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4746/1788/files/6504731454.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2483/4975/files/11722130280.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0811/4340/files/tapivisobatofutokexapi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/31995481059.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1055/5041/files/electron_configuration_worksheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7287/0807/files/ak_jain_physiology_volume_2.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2331/8686/files/23559144032.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_off000079b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x79B5 5884 bytes
SHA-256: d2d8bb0e49792328e6aab00da501d4dd146c5c0461521fef8c7cebeb90a78c56
font_01_sfnt_off00008dd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8DD3 10072 bytes
SHA-256: 08421fc83e550bee00b2bd150fbf7411066f8a9383ff5ad36bccc22f4148ea3d

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