Malicious PDF — malware analysis report

Static analysis result for SHA-256 8452b436bfc8f95d…

MALICIOUS

PDF

48.0 KB Created: 2020-08-12 06:03:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: fb7110bf3db9dcb313f25310c89f9cae SHA-1: 497558529443534e99efd18434b86d4d0cd47bc2 SHA-256: 8452b436bfc8f95d04ac528ea155b61ea1a19bcb985dc5dd2e3cf15483e38cb7
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, suggesting a link farm or phishing lure. The primary redirector URL is `https://ttraff.ru/pify?keyword=valquirias+paulo+coelho+pdf+gratis`, which is flagged as malicious. This indicates the document is designed to trick users into visiting malicious websites, likely for credential harvesting or malware distribution.

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=valquirias+paulo+coelho+pdf+gratis In PDF document text
    • http://files.ancientpocket.com/uploads/1/3/0/8/130814226/voteg-vunef.pdfIn PDF document text
    • http://files.poppyinthewillows.com.au/uploads/1/3/0/8/130813846/vuvawufes_romajejopo_tefifamuriz.pdfIn PDF document text
    • http://files.mrwise.org/uploads/1/3/2/7/132740804/vowaxagoj.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/1/0429/3410/8323/files/nirivoparijixurabeline.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6385/9617/files/tuwisuxozej.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5725/8401/files/weruwaxovoxerinex.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9767/6192/files/nanevalowidovunizak.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5907/6510/files/array_data_structure_in_c.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3853/0965/files/45525033883.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/8150/4670/files/38058754844.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4155/3575/files/zefuxu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0447/3815/0549/files/pandoc_html_to_css.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/3993/1033/files/nomuma.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6124/7129/files/nomujedenejatikawaboviz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6146/8574/files/49639993928.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 5

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_off00007a68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A68 5508 bytes
SHA-256: 24d66a9e22563d47502a4ad62180e16f64b43beab1b61e191ee44a93972cfa8b
font_01_sfnt_off00008d14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D14 10976 bytes
SHA-256: 400481e94d3676a8be8fe86ece14498789b3dda542a4705dddd5e43566651f5c

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