Malicious PDF — malware analysis report

Static analysis result for SHA-256 b40120dcaa595ee9…

MALICIOUS

PDF

43.3 KB Created: 2020-08-09 17:21:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 927f1a97afdf9f8581e129f23e5bf630 SHA-1: e7aaa9e24e3a914842d163fa165989b6975b7c36 SHA-256: b40120dcaa595ee9d3bf85a9ef4c6394d60b9e47ab48128f1dd4afb6d8ccf0ac
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, identified as a link farm, with a critical heuristic firing for a malicious redirector. The primary malicious URL is https://ttraff.ru/pify?keyword=immunization+and+cold+chain+management+pdf, which likely serves as a lure to a malicious payload. The document body itself is heavily obfuscated and contains metadata suggesting it was generated by wkhtmltopdf.

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=immunization+and+cold+chain+management+pdf In PDF document text
    • http://files.uninetimg.com/uploads/1/3/0/7/130776221/8437887.pdfIn PDF document text
    • http://files.406techteacher.com/uploads/1/3/1/4/131438234/tiwolemoxojadifu.pdfIn PDF document text
    • http://sawulet.michaeljohnsonhs.com/uploads/1/3/0/8/130814328/pijodatuvemimivizide.pdfIn PDF document text
    • http://files.karenchickfineart.com/uploads/1/3/0/7/130739443/22995861.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/1/0430/9454/0452/files/90795063911.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/5503/7093/files/kaponabit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4557/7116/files/wafesojazopeburizawu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0195/3952/files/teguperajudir.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9722/6402/files/tojijutejabusekope.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9853/0202/files/nekufovoveme.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6078/8390/files/brain_teasers_puzzle.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3199/4280/files/airframe_book.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9461/3924/files/351399324.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/30347825404.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7634/4225/files/27815726962.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9200/9379/files/jevesak.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1864/7709/files/ferudetamutunaluloz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7334/6463/files/k_lite_codec.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_off00006a39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A39 5284 bytes
SHA-256: 51949f8d4548b232fd6bfa0d65cc971765b655a28ba8bfe25d56b39146744f5f
font_01_sfnt_off00007c1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C1D 10388 bytes
SHA-256: c8615e011528dbae00c1a1492336696ab2ae9da451893fc0fd11e60bbaabf02a

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