Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf0e419326dbb0cf…

MALICIOUS

PDF

73.0 KB Created: 2020-08-02 17:20:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: b56ed31ef2b500b64adae753931505d8 SHA-1: f2fced2a2289a78eea00cb80b35a9045b78a5f19 SHA-256: cf0e419326dbb0cf84231739a08c4a3d95cb32b4b019c21a1669d4e528559f57
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector. The document body, though heavily obfuscated, contains a reference to the URL that triggered the malicious redirector heuristic. This suggests the primary intent is to lure the user to a malicious site via the embedded link.

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=silberberg+chemistry+6th+edition+pdf In PDF document text
    • http://files.bowleylockcompany.com/uploads/1/3/1/4/131454521/c5a57aa4a.pdfIn PDF document text
    • http://files.matthewpeckhamtenor.com/uploads/1/3/1/4/131408581/4497099.pdfIn PDF document text
    • http://files.thymesquareca.com/uploads/1/3/1/3/131398177/bupumok-zofenasudu-busoke.pdfIn PDF document text
    • http://files.triplethreatns.com/uploads/1/3/1/4/131406149/simupipuxugerel.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/1/0431/6620/4066/files/nutojonoje.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3650/6272/files/price_action_trading_system.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9778/3458/files/77697086653.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4585/5137/files/47625746915.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3491/8568/files/guvopewuxoradorizes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8982/1847/files/wenur.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7338/8190/files/fexifiboluzokusebat.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5016/3609/files/overcharged_capacitor_wow.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/2013/9170/files/mazda_cx_9_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7365/9290/files/xopewowevopejojagape.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/27150836515.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9303/3111/files/99157901098.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 8

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_off0000d92b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD92B 5856 bytes
SHA-256: 3e56bf80ed828ca8edaf5415402ba4bbf5e166c48dda9d589db1f06c6ca787b7
font_01_sfnt_off0000ecfb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECFB 13008 bytes
SHA-256: 0fa06310eeb5218a061b22eae7fdc76da9816f7217b5e0bd1381087f7b017be4

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