Malicious PDF — malware analysis report

Static analysis result for SHA-256 18dbe581408f1ccb…

MALICIOUS

PDF

47.4 KB Created: 2020-08-19 06:57:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 1e76d372d77a1336bc6f91576864aae1 SHA-1: ca2bac8fbd7977121fc9a37514f541250164cbce SHA-256: 18dbe581408f1ccb93a2811c6938cf949acf80b09c85f72dc7eeb74b6cba2e1b
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links, many pointing to a redirector service that ultimately leads to a phishing lure for 'formation chaudronnier soudeur'. The ML classifier strongly indicated maliciousness, and the presence of multiple SEO-linked PDFs suggests a campaign to distribute malicious content. The primary malicious IOC is the redirector URL.

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=formation+chaudronnier+soudeur In PDF document text
    • http://files.johnbeswickfurniture.net/uploads/1/3/1/8/131860204/demijola_gupiletubavofi_debigun.pdfIn PDF document text
    • http://files.bohemianattic.com/uploads/1/3/1/0/131070618/zixopi_kodovajofogexew.pdfIn PDF document text
    • http://files.bellacalore.com/uploads/1/3/0/7/130775396/dofapijikasetake.pdfIn PDF document text
    • http://kuwitaxap.makingscentsofsoy.com/uploads/1/3/2/8/132814718/xedug.pdfIn PDF document text
    • http://fibako.christinawei.com/uploads/1/3/0/7/130775511/xaxire.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/1/0437/0278/0057/files/zoxakafam.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3622/1341/files/wupulixosiro.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2642/3701/files/wivemaged.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0452/6401/1421/files/bernie_madoff_book.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2149/1621/files/57789064140.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9372/1255/files/sumepapig.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5743/0176/files/extraccion_de_aceite_por_arrastre_de_vapor.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0450/3640/4900/files/86583960022.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7673/0533/files/44929456585.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2265/4362/files/doxizaxiwuvag.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7015/3113/files/pulozesivo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0143/0695/files/pnrc_2018_date_sheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7845/1351/files/siwogijaxenokezasajis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6077/2515/files/mipudeliz.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_off000079b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x79B8 5100 bytes
SHA-256: 03b8977d25e608eaf26df11960963bfb8c6b2b88bc92a1973a60c3b45880ddf4
font_01_sfnt_off00008ad6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8AD6 11464 bytes
SHA-256: 777495a2b27c1e3d16038cdc90832f388a88aadcad80a31988832507da57e002

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