Malicious PDF — malware analysis report

Static analysis result for SHA-256 79cebbe70d4beb76…

MALICIOUS

PDF

42.6 KB Created: 2020-08-17 00:31:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: aeb336bb67a0dad96af20e3942331d81 SHA-1: 8bc687f836fc62043b8bcd666f9b978a33d16f2b SHA-256: 79cebbe70d4beb76cb4bb5e32201f9851d08c32ebbeccc67f3833ce7a74e6b2f
194 Risk Score

Malware Insights

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

The PDF contains embedded links that point to a redirector URL, which is flagged as malicious. The document body, though heavily obfuscated, contains text that appears to be a lure for downloading media content. The presence of numerous links, many pointing to SEO-optimized PDF files, suggests a link farm or phishing operation.

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.ru/pify?keyword=ak+47+song++mp4+audio In PDF document text
    • http://files.williampeskett.com/uploads/1/3/1/0/131070313/1053294.pdfIn PDF document text
    • http://files.keynshamcricket.com/uploads/1/3/2/8/132814463/1e002141a85.pdfIn PDF document text
    • http://files.s1gkusa.com/uploads/1/3/0/8/130873942/neduxitum.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/1/0434/6275/4461/files/46955249395.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9812/9059/files/vitisobavex.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2439/2087/files/learn_google_apps_script.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/2515/9576/files/tupezov.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8362/0767/files/lobumafogimevire.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5526/8519/files/actor_s_thesaurus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9540/0356/files/xoxewule.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4241/4492/files/rirumenutadi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0228/1633/files/rudalexisewi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4397/7366/files/22541628119.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0873/6927/files/niboz.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_off000068eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x68EB 5372 bytes
SHA-256: 1f8d2c9de2ada50a95376caf1d9f5ff9e72b11d4a9e4fb02cdda47752877da94
font_01_sfnt_off00007b2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B2C 10192 bytes
SHA-256: c679a656da514ede80eca4c639d8e27275c8139d690967f744fb2196450d70c5

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