Malicious PDF — malware analysis report

Static analysis result for SHA-256 40144ee80c0940e9…

MALICIOUS

PDF

43.8 KB Created: 2020-08-25 00:55:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: c5aef69255cde90f73774d7170e392e3 SHA-1: 30e9fb2093b1f037d79231905d82475fc64696ed SHA-256: 40144ee80c0940e96fc54c9724b3cba52a5f952123b970266acfd2588979bf66
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a mass of external links, many pointing to what appears to be a link farm designed for SEO manipulation. One prominent link, https://ttraff.ru/pify?keyword=asphalt+7+android+game, is identified as a malicious redirector. The document body, though heavily obfuscated, contains references to this URL, suggesting the primary intent is to redirect users to malicious infrastructure. The ML classifier strongly supports the malicious nature of this PDF.

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=asphalt+7+android+game In PDF document text
    • http://files.jberaeroclub.com/uploads/1/3/0/8/130874646/lasopuxuzofijofapowu.pdfIn PDF document text
    • http://mojabuz.landscapegardenerscamberley.co.uk/uploads/1/3/1/4/131483245/lebajojom.pdfIn PDF document text
    • http://files.alesiaart.com/uploads/1/3/1/8/131856232/4771045.pdfIn PDF document text
    • http://gikugukem.cobbosseeconteesnowmobileclub.com/uploads/1/3/0/9/130969521/6c423cf50a18a.pdfIn PDF document text
    • http://lorewuj.element3healthclubs.com/uploads/1/3/0/8/130815017/3115306.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/1/0445/3341/6095/files/30405314476.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0451/9323/2535/files/libro_diario_de_los_escritores_de_la_libertad.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/4104/4118/files/gopodomikajodero.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7542/0835/files/forasopijafonotobojak.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3696/6055/files/lopovonomesigetuxufozasu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1888/7068/files/5457450961.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9802/1793/files/beginner_violin_duets.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9569/5266/files/xiruwapejobi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5928/1048/files/zelajigane.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4116/0344/files/apprendre_a_parler_anglais_gratuitement.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6038/0327/files/28502120791.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0845/0972/files/vategowisesizebonoxamor.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006cae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6CAE 5444 bytes
SHA-256: 3821b12758a8e4fb8293be776423f48d9ce527bebf3453f8a6d10b12ee9c5d01
font_01_sfnt_off00007f00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F00 10292 bytes
SHA-256: 22c6dc64fc7b68a7ea708d9fc98649a9e8abe4bcf51b20a2488deccd8e2fe728