Malicious PDF — malware analysis report

Static analysis result for SHA-256 8bf4b4f6214ac2da…

MALICIOUS

PDF

43.8 KB Created: 2020-08-01 19:50:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 4bd0b19e58bdba85678931bff3e50f65 SHA-1: 959dd75b6dbb2c1401c7161b734fc76a67c3b95d SHA-256: 8bf4b4f6214ac2da459f170796ee215c33031c825a46eb2ea4557a32c0b1ce54
194 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to redirector infrastructure, suggesting a link farm or phishing campaign. The document body, though heavily obfuscated, contains a URL that is also flagged as a malicious redirector. The presence of multiple embedded links and the ML classifier's high confidence indicate a malicious intent to redirect users to potentially harmful content.

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=image+10.+0+treadmill In PDF document text
    • http://files.triaddjservices.com/uploads/1/3/1/8/131871984/c9c655ba22cdd0.pdfIn PDF document text
    • http://files.onestitchtwostitch.com/uploads/1/3/1/4/131407164/gofogexujukijobu.pdfIn PDF document text
    • http://files.mauriceparent.com/uploads/1/3/0/7/130738614/64e172e7e.pdfIn PDF document text
    • http://files.hillcountryyoungmarines.com/uploads/1/3/1/3/131384113/5485733.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/1/0431/4886/9789/files/jofuvelutefosukuzumere.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8695/4140/files/vutufu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5288/3352/files/voxul.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6208/3232/files/65468962242.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1903/2987/files/66882059587.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1126/7990/files/pidebazet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8804/4447/files/46886433060.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0319/9136/files/19075617652.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8837/0072/files/rizaxewixikigonum.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9862/8501/files/86600154629.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0221/5074/files/4156888794.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0381/3781/files/26892244273.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_off00006d0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D0A 5128 bytes
SHA-256: 9c95bfbcac944224d5a08410ccde488fb0165ee98a3ac9f74bd19137261ba334
font_01_sfnt_off00007e64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E64 10512 bytes
SHA-256: 8b9b0205e3879c172362fc2bd38163c05785cf6393b049c1609b0c5646ac8761

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