Malicious PDF — malware analysis report

Static analysis result for SHA-256 21a67ae7532b104e…

MALICIOUS

PDF

37.5 KB Created: 2020-08-08 11:08:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 012a1d6d37cd9f24240fbcb156f2c149 SHA-1: aef6ce02d9f4850287e5d0fad213eabc2131938a SHA-256: 21a67ae7532b104ed33ba1fa6f9c687ba2717dda780b9ecda0e41315f402b1a0
194 Risk Score

Malware Insights

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

The PDF contains numerous links, including one to a known malicious redirector, ttraff.com. The document body, though partially corrupted, suggests a lure for a free PDF download, aligning with the malicious redirector's purpose. The presence of a link farm heuristic further indicates an attempt to distribute malicious content or manipulate search engine results.

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=big+ideas+simply+explained+pdf+free In PDF document text
    • http://raguxat.salmonriverwoodworks.com/uploads/1/3/2/7/132740214/zibimam.pdfIn PDF document text
    • http://nelug.danawaldonphotography.com/uploads/1/3/2/7/132740836/1ee5eef.pdfIn PDF document text
    • http://funabifak.gtchsdevelopment.org/uploads/1/3/1/4/131453329/5761168.pdfIn PDF document text
    • http://files.shoptwoowls.com/uploads/1/3/2/7/132740614/ad27ede560bf6.pdfIn PDF document text
    • http://relone.taghmonns.com/uploads/1/3/1/6/131636725/kuwanule.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/1/0431/3723/7146/files/47645944702.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0200/3619/files/37124282069.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9279/5801/files/74287083560.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8741/9805/files/firebug_for_chrome.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/1138/1147/files/benton_sans_font.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8570/2054/files/california_dmv_bill_of_sale.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6989/8909/files/80723922649.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/51994241049.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2240/1185/files/15485523951.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6068/1111/files/agri_fab_leaf_vac.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9832/5663/files/43179157028.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2133/5702/files/zexuxadodufositepugide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0500/8293/files/adobe_reader_for_pc_exe.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 6

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_off000053c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x53C9 5580 bytes
SHA-256: 0a603bc49a10a82c5d174cf779cc4a958db7953f0be8ebd9d9683bb45913a65f
font_01_sfnt_off000066cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66CB 10080 bytes
SHA-256: e3f90f51d2ed1a6f0f523bc7bd337bfb6c7ccfae9fb5eed8cf6cd4efa2193ea9

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