Malicious PDF — malware analysis report

Static analysis result for SHA-256 6590e87aa7564897…

MALICIOUS

PDF

40.0 KB Created: 2020-09-17 12:54:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 4af4694544882aa40f2f3c9104bb329f SHA-1: f15833a8de3135a50d371504670cbeceae205492 SHA-256: 6590e87aa756489732ea7a6dddb698e81876ec581f77115052aed01934c87fbc
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm and a specific redirector URL, 'https://ttraff.me/wix?keyword=thank+you+mr+falker+worksheets', which is flagged as malicious. This suggests a phishing or scam attempt, likely using the 'free download' lure to direct users to malicious infrastructure. The document body, though heavily obfuscated, contains the same redirector URL and other URLs pointing to PDF files, reinforcing the link farm and redirection attack pattern.

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.me/wix?keyword=thank+you+mr+falker+worksheets In PDF document text
    • http://files.islandgemcreations.com/uploads/1/3/1/3/131381539/e458903966e.pdfIn PDF document text
    • http://files.millworksart.com/uploads/1/3/0/7/130740625/2023764.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/1/0434/5279/2982/files/62885385001.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1480/6937/files/sbi_credit_card_application_form.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5366/2883/files/xojaxotepaniwemuli.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8126/0440/files/connecting_math_concepts_independent_worksheets_level_b.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/9887/9640/files/938784411.pdfIn PDF document text
    • https://bdb26303-795b-42bb-8b26-c88a16b42170.filesusr.com/ugd/1e52da_a3cec294a23f441b91f700d24026f2b2.pdf?index=trueIn PDF document text
    • https://2aa0281e-6f77-4f2a-9a89-59f775a397cb.filesusr.com/ugd/f2ef67_cbd0c19fadad49ccb1be6a3466a0b016.pdf?index=trueIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4361/7959/files/44370619702.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0313/4627/files/xevugodidukilupele.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zofoxi.pdfIn PDF document text
    • http://www.readwritethink.org/classroom-resources/lesson-plans/digging-deeper-developing-comprehensiIn 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 4

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_off000056c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x56C8 5216 bytes
SHA-256: f44256161c1b5774668dbc14122f9eeb8c3b5fb44ae777b210d9038a6c41ae44
font_01_sfnt_off00006873.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6873 13964 bytes
SHA-256: 71c693fdd6930175e32e8c977014bdbff1e7af7853fd8c3ff1f7424a0a596ea1

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