Malicious PDF — malware analysis report

Static analysis result for SHA-256 76436d4db530de7d…

MALICIOUS

PDF

61.2 KB Created: 2020-08-24 22:51:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 4cb127d1f37efe479114e470483cb12b SHA-1: e1e88b0db0b43dd44448569e0a41d59fbed49c1c SHA-256: 76436d4db530de7da35f18ef4cf29db6f83b2902f52b0e6e5fc2099c65213d4d
194 Risk Score

Malware Insights

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

The PDF contains multiple heuristics indicating malicious redirector links and a link farm, suggesting a phishing or scam attempt. The embedded URL points to a redirector that ultimately leads to a suspicious domain. The document body, though heavily obfuscated, contains a URL that is also flagged by heuristics as a malicious redirector.

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=types+of+aquifers+pdf In PDF document text
    • http://files.benkipiyako.org/uploads/1/3/1/4/131437117/41abe8ff4c5562.pdfIn PDF document text
    • http://files.kaizenhealthandwellness.com/uploads/1/3/2/6/132695694/ed469e1437.pdfIn PDF document text
    • http://vimuseduw.foxwoodarabians.net/uploads/1/3/0/9/130969634/2ee2908ea.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/1/0428/5097/5910/files/multivariate_data_analysis_book.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/6521/1035/files/740222792.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1415/0565/files/vipadotoxitizini.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4176/7072/files/comparative_adjectives_worksheets_for_kindergarten.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0326/3650/files/26194606146.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0657/4240/files/48773943545.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/gokibaleginasesomedusuj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2859/4336/files/how_to_report_spearman_correlation_results_spss.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6749/7880/files/induction_cooker_cooking_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9947/8434/files/60681681300.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3540/1112/files/20422866877.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_off0000b226.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB226 5180 bytes
SHA-256: a34ee3e932486147516997cac4a3fd329a969c49f4bf8275a224c09b60812ee2
font_01_sfnt_off0000c3db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC3DB 10488 bytes
SHA-256: 517ccf8f2f0927c2d95e9fd988a18deecd4ad3862f87d27b6a752804c57a5ece

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