Malicious PDF — malware analysis report

Static analysis result for SHA-256 570c91d84cae8197…

MALICIOUS

PDF

34.6 KB Created: 2020-08-22 19:55:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: b5477f383ee44a707a1315fde9f2a3e4 SHA-1: 1369b18c49a1f22ef1edf3f9f8a28d97b91fe63f SHA-256: 570c91d84cae8197998907be22bdcdae7d777f4566ca2310ab4ee4ae079601cc
194 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK and PDF_SEO_LINK_FARM heuristics. The document body, though heavily obfuscated, contains text suggesting a lure for free software downloads, specifically mentioning "Archicad 15 tutorial pdf free" and a URL that matches the redirector. The ML classifier also strongly indicated maliciousness.

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.cc/pify?keyword=archicad+15+tutorial+pdf+free In PDF document text
    • http://roser.insightcounsellingtoronto.com/uploads/1/3/1/4/131414661/boregetunajilulod.pdfIn PDF document text
    • http://files.oatvalleybaptist.com/uploads/1/3/2/6/132695339/7605778.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/1/0431/9769/4114/files/asian_history_book.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5942/0063/files/xakumimujapiwezi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9753/9231/files/fundamentals_of_applied_dynamics_williams.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7767/1843/files/34901648656.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3009/3728/files/9073317493.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/7027/3174/files/17564728456.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7440/3996/files/vibemizaluke.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/8901/6472/files/dofapurodufub.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_off000048e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x48E2 5232 bytes
SHA-256: 87eb193a4b2db2b7dc5598d79aa5bbd44f4da8bda895459ebd2273bef1cd07a9
font_01_sfnt_off00005aa9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5AA9 10320 bytes
SHA-256: 295ac34fb75488cf795fcf099bcacffaaeb1784c8b2fb5af86b0d54ed8e0d498

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