Malicious PDF — malware analysis report

Static analysis result for SHA-256 83edfac2596f6943…

MALICIOUS

PDF

32.1 KB Created: 2020-08-24 08:04:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: c8198db8c4f33b0802030817c2380127 SHA-1: fb7ef3b680756b6343ee9af0132f0956585b7480 SHA-256: 83edfac2596f694340bfde8b7b639f2b0d7035d8c82f6758c1eae17c2fa27357
194 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with a critical heuristic firing for a malicious redirector. The document body, though heavily obfuscated, contains a URL that matches the redirector heuristic, suggesting an attempt to direct users to malicious infrastructure. The presence of numerous external PDF links further indicates a link farm or phishing attempt.

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=atro+chatro+comedy+video In PDF document text
    • http://files.marinwoodturningandcompany.com/uploads/1/3/1/3/131379678/04b1ce7d6ae.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/1/0436/4979/4213/files/dobuleri.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5720/9753/files/4563985400.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8611/9079/files/mefunevedutojal.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7960/5147/files/farmakokinetik_antasida.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4499/5221/files/lisere.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6592/3992/files/51388037753.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6410/5886/files/24106899654.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5671/6183/files/aprender_portugues_1_gratis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9588/2918/files/calculus_7th_edition_stewart_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5316/1367/files/uva_darden_employment_report.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0271/4533/files/jusuzuwew.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_off0000428c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x428C 5120 bytes
SHA-256: ebf90826ae83fe18a13862423d0a43081496b7f7345e4040fd9516f3d19f9099
font_01_sfnt_off000053d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x53D9 9408 bytes
SHA-256: ca1c7b6a0d0a40204001fbb38dfa2b73a520113d8c0b6f40cc0ff536ed006d76

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