Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a4134bcb50ea7ba…

MALICIOUS

PDF

38.2 KB Created: 2020-08-06 05:49:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: fefe9c55f75c35a8400305c6cad88f0d SHA-1: ae0326e327095cdebc74006e5c3dace21a4f23ab SHA-256: 0a4134bcb50ea7ba0fd7e3878dd31690ee13a877bac030bc0ec7ebb3e84c2fe7
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many pointing to a redirector service at ttraff.ru, which is flagged as malicious. The document body, though heavily obfuscated, contains text suggesting a lure related to "Briton door closer pdf". The presence of many external links, including to Shopify domains, indicates a link farm or SEO manipulation tactic to distribute malicious content. No scripts were extracted, but the PDF structure and embedded links strongly suggest a phishing or redirection attempt.

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=briton+door+closer+pdf In PDF document text
    • http://files.mathfuntastic.com/uploads/1/3/1/4/131453818/silufudoviwojukil.pdfIn PDF document text
    • http://files.vicenzas-crostoli.com/uploads/1/3/1/4/131483253/9062675.pdfIn PDF document text
    • http://files.onbeyondz.net/uploads/1/3/1/8/131858916/2140355.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/1/0437/7686/8510/files/ligenezomif.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6798/1474/files/ukp_akreditasi_puskesmas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8761/6413/files/antibiograma_para_urocultivo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4460/9943/files/26977961833.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1800/2340/files/84431368802.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9610/5375/files/kasado.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2338/5247/files/88812385625.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3277/2757/files/28800731545.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7089/7824/files/xefamelaketawiv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2684/9700/files/2175110401.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2524/4053/files/yeh_jawaani_hai_deewani_cast.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1035/8439/files/vabebunefuvenudu.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_off0000594b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x594B 4988 bytes
SHA-256: 6a9ace9a1a86825707c855c9b151907c97195966731253df2dfe4b6199be6dd0
font_01_sfnt_off00006a57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A57 9984 bytes
SHA-256: 90c9c3de90616a22de32b41d913d2a78ffb81e07881e4bc4ce8e4e67a440f173

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