Malicious PDF — malware analysis report

Static analysis result for SHA-256 50b8368b82bfbe99…

MALICIOUS

PDF

36.6 KB Created: 2020-08-15 07:30:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 5f6c43d2068eb99f0ef20645248a007a SHA-1: bf10454e4f83564d26b0de983b7d2666eb258d4a SHA-256: 50b8368b82bfbe9942e1e46b234f55a80a4683612ba78ac79ba2a3d0058b42a9
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a critical heuristic firing for a malicious redirector link. The document body, though heavily obfuscated, includes the same URL. This URL is likely used to redirect the user to a malicious site, potentially for further exploitation or credential harvesting. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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/wb?keyword=zero%20first%20and%20second%20conditional%20exercises%20with%20answers%20pdf In PDF document text
    • http://files.nwgachampionship.com/uploads/1/3/1/8/131856039/novofiradop.pdfIn PDF document text
    • http://sojad.waynetownshiptrustee.com/uploads/1/3/1/6/131606122/9508350.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/1/0433/6710/4668/files/kasewix.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2628/2658/files/atm_full_form_in_english.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1471/7597/files/snap_circuits_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8856/7706/files/auguste_comte_a_general_view_of_positivism.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8419/3697/files/89505002618.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0705/7825/files/bimupagiditigawipiw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/9391/5800/files/wumod.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_off00005054.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5054 5360 bytes
SHA-256: d91abce37acf978a3e041261909b3602a5ad1a6ea60e05b81addab0ae20bccf4
font_01_sfnt_off0000629a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x629A 10152 bytes
SHA-256: c49935ddecbe7e1cdee6dc39065b86597d47e1f97a8a17fb7e7f42011e2e419c

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