Malicious PDF — malware analysis report

Static analysis result for SHA-256 40a545a8dbfa060d…

MALICIOUS

PDF

37.8 KB Created: 2020-08-09 16:10:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 686847af9f6ed8a8508ff6d56635439f SHA-1: f923ee519b9a904b976132362c7593a85dfa6c7a SHA-256: 40a545a8dbfa060ddf589c0e22e70ae6e6100c4191b7889da6a7af22a66bfe6a
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external PDF files hosted on Shopify. The primary link, https://ttraff.ru/pify?keyword=brain+fever+symptoms+in+tamil+pdf, is identified as a malicious redirector. This suggests the document is designed to lead users to malicious infrastructure under the guise of providing information.

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.ru/pify?keyword=brain+fever+symptoms+in+tamil+pdf In PDF document text
    • http://files.jonathanedgingtonwriter.com/uploads/1/3/0/8/130814225/fifodudomakugeruzul.pdfIn PDF document text
    • http://files.cckidscamp.org/uploads/1/3/0/7/130775109/321b19.pdfIn PDF document text
    • http://files.eckelsystems.com/uploads/1/3/0/7/130738701/c314eba05cd3.pdfIn PDF document text
    • http://files.organicfarmerdon.com/uploads/1/3/1/4/131483002/bifororikebozoriwapi.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/1/0429/4243/1395/files/37548258357.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7813/9556/files/ximebapaxetakodegil.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6519/6197/files/tratamiento_angina_de_pecho_estable.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4016/9374/files/elementary_number_theory_burton_solutions.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/6145/0654/files/sabevof.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5747/0872/files/787954521.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1065/3338/files/47051683606.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3512/2081/files/27692921176.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7793/5005/files/54015010295.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_off0000514f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x514F 5400 bytes
SHA-256: 6babc87e96ed1c9c604b4981e50c167944b1a102d9b4b8734050d10567269f34
font_01_sfnt_off000063a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63A9 12152 bytes
SHA-256: b768225b3d8ed95460932730b9071aaca35b99190279d5334cec6f6e34b6d7f0

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