Malicious PDF — malware analysis report

Static analysis result for SHA-256 257c72d534c3ff1d…

MALICIOUS

PDF

53.5 KB Created: 2020-08-09 17:23:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: af7bd4e88459d61b155ef6af8da9a63c SHA-1: b35c16d84d75fd3a994ca113fb0671c7fecd421f SHA-256: 257c72d534c3ff1de0fca0d47d002a0c7f726e64d4644c7a59eaedcf49028e52
194 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with a critical heuristic firing for a malicious redirector link. The primary malicious URL identified is https://ttraff.cc/pify?keyword=dallas+airport+map+pdf, which is likely used to redirect the user to a malicious site. The document body, though heavily obfuscated, contains references to the redirector URL and other URLs hosted on Shopify and custom domains, suggesting a coordinated effort for link farming and potential malware distribution.

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=dallas+airport+map+pdf In PDF document text
    • http://files.joellekaspar.com/uploads/1/3/1/4/131454984/ddaacb373028.pdfIn PDF document text
    • http://files.janhaldane.com/uploads/1/3/0/8/130874278/nubasu_mifugeboti_sinamozebopekab_tosajawel.pdfIn PDF document text
    • http://files.historicnorthampton.org/uploads/1/3/1/1/131163904/womawilofupa.pdfIn PDF document text
    • http://kenalu.ottercreekcc.org/uploads/1/3/1/3/131379578/benadekitixavexisiz.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/1/0428/2312/3100/files/metro_2020_online_book.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3237/1622/files/54590043298.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7180/7381/files/econometric_analysis_of_panel_data.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9885/5840/files/genetic_engineering_and_biotechnology.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9770/1032/files/86034098387.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2898/7547/files/98374934156.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/1036/5339/files/duwotewaxejatigazobuz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7101/2006/files/biohacking_secrets.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6006/0567/files/zasisebefinovup.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7424/7069/files/tinujifowagaxodofigere.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/5827/5238/files/mafinatukijidisidu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5461/2123/files/favozigonafimet.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_off00008cf2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8CF2 5188 bytes
SHA-256: 8e1b3ebdffe9f45d4b6be5a5c74ba9083b5aef098e7b6f9bfcb259defebe3e95
font_01_sfnt_off00009e82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9E82 13496 bytes
SHA-256: bb0e6bb99d9668f66b9a76d10ef5c4cf2b38847be55c1e694e6308f326068254

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