Malicious PDF — malware analysis report

Static analysis result for SHA-256 90453d7d1bc549e3…

MALICIOUS

PDF

48.1 KB Created: 2020-07-31 06:17:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 8d7df11001dbbd647390adae72dde4e0 SHA-1: 286f559afb06aeaf475e082e0fa1354af2e5159d SHA-256: 90453d7d1bc549e39673c5a86e69fb69890a4b970cb611761640d443ba65d9ef
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 Malicious Link T1059.001 PowerShell

The PDF file contains a heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK, indicating it directs users to a known malicious URL. Additionally, PDF_SEO_LINK_FARM indicates a large number of external links, likely for SEO manipulation or to host further malicious content. The document body, though heavily obfuscated, contains text related to 'Mastering Bitcoin' and the wkhtmltopdf tool, suggesting a lure to download or access malicious content disguised as a free PDF. 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.ru/pify?keyword=mastering+bitcoin+pdf+free In PDF document text
    • http://files.oehlermill.org/uploads/1/3/0/8/130873875/1eda9ac.pdfIn PDF document text
    • http://files.lebanontours.info/uploads/1/3/2/6/132681033/wexifijazama.pdfIn PDF document text
    • http://files.guldustah.com/uploads/1/3/1/3/131383453/wajamafifebovir_pesakoxidogak.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/1/0430/9850/5369/files/16234844416.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/1459/2408/files/namawafuw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3873/4496/files/90674975882.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3346/7807/files/bamawikoxanupusugovuse.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5970/8058/files/63212463196.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8015/4269/files/67201406019.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1543/0559/files/fakupezas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7279/0427/files/xulelij.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5562/0006/files/18884045410.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/datufezon.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3002/0247/files/xidudebizuzu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9507/2674/files/17156242870.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8904/4383/files/rikudune.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 7

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_off00007d06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D06 5224 bytes
SHA-256: 8f32744c4817a7fd7569732e2522c0733737c06a586295053c82f519853b077d
font_01_sfnt_off00008ec9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8EC9 10672 bytes
SHA-256: b72b79836211416f6d1e1ae36c9660de6a912c06875f95b8e2670d4ed38c911f

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