Malicious PDF — malware analysis report

Static analysis result for SHA-256 3fd526d707b25653…

MALICIOUS

PDF

48.3 KB Created: 2020-07-30 18:41:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 0067eed21d5eb99234adeff1ee7a2f76 SHA-1: 5db3644b626c34c1484cd426d0ec56994d85fb64 SHA-256: 3fd526d707b256531edd3628834d7ac7b80b2bda66b9351ab950c380a8c82577
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links, with one critical heuristic firing indicating a malicious redirector. The document body, though heavily obfuscated, contains text related to 'balanced diet pdf' and the authoring application 'wkhtmltopdf', suggesting a lure. The primary malicious IOC is the redirector URL, which is likely used to funnel victims to a further stage of the attack.

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=define+balanced+diet+pdf In PDF document text
    • http://files.sexualityintheolderadult.net/uploads/1/3/0/7/130739648/5173129.pdfIn PDF document text
    • http://files.suzanneensmann.com/uploads/1/3/0/7/130740213/8111258.pdfIn PDF document text
    • http://files.cambridgenyupc.org/uploads/1/3/1/3/131398222/xidikagepagugu-moxifodu.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/1/0433/2870/0571/files/61869976437.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4575/6821/files/61266059310.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/5171/8558/files/94289064800.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7235/5478/files/48393827640.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2351/5294/files/xazuposelapugebi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7213/5074/files/67155244702.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2561/3475/files/ziwevukudaruwomeduw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0047/1456/files/xilidefavexuxabotixo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/12457093378.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6042/8962/files/rojogudanuwapodu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6871/0300/files/42300417658.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6397/5835/files/rukuro.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8991/0165/files/tenubuliviborapag.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8073/6156/files/gowoseremuzeku.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9148/3032/files/96726602651.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 5

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_off00007e97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E97 4692 bytes
SHA-256: 66d96332c0e6e9d098388a6bef8d5a6f0384f58557b0cb7cb34b3ff6553f5126
font_01_sfnt_off00008e95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E95 10756 bytes
SHA-256: 6141c3780c74fb34e1e316ac2cf78ccc8bfb740f3a3e000ed10ae97088f31ebb

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