Malicious PDF — malware analysis report

Static analysis result for SHA-256 66b028a1da21f8a0…

MALICIOUS

PDF

58.9 KB Created: 2020-08-04 18:00:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 163d01ffa3a683c47dbba1a23c8a024c SHA-1: 19402b8244f95c1e20ceedde3caeca309dec0ed9 SHA-256: 66b028a1da21f8a0d556a32627604ded008616f29c75f8049cb5f2b23983b5dd
194 Risk Score

Malware Insights

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

This PDF document contains numerous links designed to create a link farm, with a primary redirector pointing to malicious infrastructure. The document body itself contains obfuscated text and a URL that further reinforces the malicious intent. The ML classifier strongly indicated maliciousness, and the presence of multiple redirector links suggests a phishing or scam 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.cc/pify?keyword=estimulador+del+nervio+vago+pdf In PDF document text
    • http://files.karenbarkeryoga.com/uploads/1/3/0/9/130969608/domibes-zigeberixilol.pdfIn PDF document text
    • http://files.tradingsmartmoney.com/uploads/1/3/0/7/130739824/dapise_dugitisil.pdfIn PDF document text
    • http://files.healingnl.com/uploads/1/3/1/0/131070526/5270969.pdfIn PDF document text
    • http://ramuri.bradleystkd.com/uploads/1/3/1/4/131453177/wafaxajatojali.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/1/0434/8795/3053/files/mewumozelajukuvofupil.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0097/8853/files/56813650054.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9060/8285/files/65641955070.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9641/6161/files/96468272236.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4519/9767/files/80962525530.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7623/1063/files/92114535743.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7211/9193/files/ripuvajadomexaxunotilix.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3871/9648/files/danotifi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8797/8913/files/26528579205.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 2

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_off0000a824.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA824 5380 bytes
SHA-256: bc2a0d2b8ca16b21ddc8122673c4c6ebbc8b170a0d5520911394c6040cf9d67b
font_01_sfnt_off0000ba63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA63 11404 bytes
SHA-256: 74788e9771895bae82e979d0c10c9707cf64008ff9ab194f24a379caa7688850

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