Malicious PDF — malware analysis report

Static analysis result for SHA-256 28539b354afd4b6f…

MALICIOUS

PDF

38.1 KB Created: 2020-08-01 08:11:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 8272638b17a215947f5dfdce53457dc4 SHA-1: 58c654b5055f74c1e2499a021945b6d1f71e255e SHA-256: 28539b354afd4b6fd6630abed560be86fa585d976d18dc4df726a6fb6cfa95aa
202 Risk Score

Malware Insights

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

The PDF file contains a mass of external links, including one that redirects to malicious infrastructure. The document body, though heavily obfuscated, contains the URL https://ttraff.cc/pify?keyword=microsoft+document+imaging+to+pdf+converter, which is flagged as a malicious redirector. This suggests the document is designed to trick users into downloading malicious content by presenting a fake converter tool.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=microsoft+document+imaging+to+pdf+converter In PDF document text
    • http://files.njsaferatios.com/uploads/1/3/2/7/132712011/xigevewiti.pdfIn PDF document text
    • http://files.williamstownjuniorsnetballclub.com.au/uploads/1/3/0/7/130775677/7073730.pdfIn PDF document text
    • http://files.triswanpress.com/uploads/1/3/2/6/132681229/tufezukusigomogo.pdfIn PDF document text
    • http://files.twigtravel.com/uploads/1/3/2/8/132814468/nuwino_pasosele_zusawitis.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/1/0436/0906/3582/files/jefip.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7623/1063/files/50228284161.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4550/9537/files/jedoma.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/5961/8716/files/xewalijifudofimonale.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0465/6797/files/38967553776.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6930/8061/files/20676579217.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7994/8705/files/wudimizagozo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/1791/0946/files/asm_handbook.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3142/0319/files/busem.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7985/1414/files/fewogamiguzuzep.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8570/8953/files/radeduxilagewapenepuw.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 8

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_off00005713.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5713 5508 bytes
SHA-256: 166a256263f38355b10eec7d551a144c7e7d82873d288fc6821da7f2b4ad82e8
font_01_sfnt_off000069c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x69C9 9844 bytes
SHA-256: 56813028bf8c8c7abda156b60c5c683e828351ba372cf7c98f15355f5dfdc365

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