Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4debea0c03e09bc…

MALICIOUS

PDF

47.1 KB Created: 2020-08-11 21:05:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 253a9ebd8de6389aca85a4eb9936f6e5 SHA-1: e3c41acbe2b4e1391fe4ab339c30d0173f751be9 SHA-256: d4debea0c03e09bc0a0d775f7966027d7c52ee981fc2b9ae382f979f96042a11
194 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, with a critical heuristic firing indicating a link to known malicious redirector infrastructure. The ML classifier also strongly flagged this PDF as malicious. The document body is heavily obfuscated, but the presence of the redirector URL and the link farm suggests a distribution or phishing campaign.

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.com/pify?keyword=just+already+and+yet+pdf In PDF document text
    • http://files.seasoulself.com/uploads/1/3/1/4/131453302/radadi.pdfIn PDF document text
    • http://zosov.sankofaoutreach.org/uploads/1/3/2/3/132303382/7548871.pdfIn PDF document text
    • http://files.richardmarshall-hardy.com/uploads/1/3/0/8/130874012/32143ebc8df59d.pdfIn PDF document text
    • http://files.learninginquirer.info/uploads/1/3/0/7/130740177/9f959503.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/1/0438/6498/1664/files/is_roblox_on_xbox_360.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7958/2374/files/sewing_to_sell_book.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7728/8611/files/prova_de_auditor_fiscal_da_receita_federal.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2226/2178/files/tosedadivowafisat.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/0807/1576/files/nanalelikurozevalomufu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0111/0940/files/kusobatupewoloturure.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6193/6282/files/7073032672.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7735/4143/files/36539196237.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7574/7484/files/inglorious_bastards_theme.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1547/8176/files/66862741618.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1607/7991/files/59135131567.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/2502/1603/files/homelite_weed_wacker.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 6

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_off00006d46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D46 5128 bytes
SHA-256: 3d985d58e0731a1bcb0ee6d607035fa14f676e632fe39d3eb291ec3053009a98
font_01_sfnt_off00007ecf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7ECF 18784 bytes
SHA-256: 7c0a7f7a0336acd26d1afedbf93ba8916dbbe2546e3fafd5fe99cbb6dac12284

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