Malicious PDF — malware analysis report

Static analysis result for SHA-256 28fd2c21d3e7ffc6…

MALICIOUS

PDF

41.3 KB Created: 2020-08-05 14:17:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 2067bc92b89e656fcda47911133510a3 SHA-1: 52a9b328db98bf2d41902425ac09a8b07eeef97e SHA-256: 28fd2c21d3e7ffc614cce1f76551ca3bca1bc4982ed74edf3d00d2128c9310e4
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector. The primary malicious link identified is https://ttraff.com/wb?keyword=switch%20hub%20router%20bridge%20gateway%20pdf, which likely leads to further malicious content. The document body, though heavily obfuscated, contains references to network devices and the malicious URL, suggesting a lure for phishing or redirection. The ML classifier strongly supports the malicious verdict.

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/wb?keyword=switch%20hub%20router%20bridge%20gateway%20pdf In PDF document text
    • http://files.classic-speedometers.com/uploads/1/3/1/3/131380175/wokivifa-givavowelamo.pdfIn PDF document text
    • http://files.anilani.com/uploads/1/3/1/4/131438456/ee2ae2.pdfIn PDF document text
    • http://files.nyclunarnewyear.org/uploads/1/3/0/7/130775665/ef5f21f7c3cfee1.pdfIn PDF document text
    • http://files.uvresa.com/uploads/1/3/2/6/132695194/196823.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/1/0433/9613/7111/files/wixasizabet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3920/3229/files/21032743493.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7427/3948/files/huf_pan_card_affidavit_format.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0357/6481/files/vidamulugiwaper.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0124/9955/files/80324873630.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2505/5389/files/48753883965.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/25424470269.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3872/8604/files/jerolotumovulidoguduri.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3446/0828/files/94560802353.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3165/7638/files/80720364588.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/78046530146.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7211/9193/files/7614651512.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/wososopozabe.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 2

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_off00006433.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6433 5644 bytes
SHA-256: 284f49f5e0706e2e2383cefb3093f80134ebab1a6bb50ae42c6c58af7df898e5
font_01_sfnt_off0000777c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x777C 9576 bytes
SHA-256: 47d3bcb2bf6733a66ef69ca41c933dd08e2a78ef626cc18a118c9eee1a82c083

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