Malicious PDF — malware analysis report

Static analysis result for SHA-256 233a2e3b2c99ef42…

MALICIOUS

PDF

37.9 KB Created: 2020-08-06 02:30:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: 9d1055d64bca364b07349f4ee5cb9e05 SHA-1: 48f6c641e86bfa2c3437288e894759da1e221079 SHA-256: 233a2e3b2c99ef42e7be2c11aeb479d854d1b01fd82fbf5ac17ffa27f8302e04
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, a common tactic for phishing or malware distribution. One critical heuristic identified a link to a known malicious redirector, ttraff.cc, which is used to obscure the final destination. The document body, though heavily obfuscated, contains the string 'Compact oxford thesaurus pdf' and the malicious URL, suggesting a lure to trick users into clicking the link. The ML classifier strongly supports the malicious nature of this PDF.

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=compact+oxford+thesaurus+pdf In PDF document text
    • http://files.southerncare.co.uk/uploads/1/3/1/4/131437625/f4a145f81f0d.pdfIn PDF document text
    • http://nunoz.neighbourhoodmassage.com/uploads/1/3/1/8/131871674/3087184.pdfIn PDF document text
    • http://files.theboisterousbabe.com/uploads/1/3/1/4/131407665/xisufe_kelekixat_zosatelu.pdfIn PDF document text
    • http://files.aurorasantiago-ortiz.com/uploads/1/3/2/6/132680860/5e358c7cc.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/1/0428/9835/8432/files/rumifagekesodurelakalon.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/datumaf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0718/0954/files/ao_da_acetilcolina.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3692/5342/files/56076231727.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0190/5315/files/ribejolomubegemexesav.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/9477/5710/files/html_to_converter_angular_6.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2631/7473/files/rasolojukarogizepado.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0041/3856/files/jitivolitidizowemisorubo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8085/2383/files/demakizasimedemo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7860/6229/files/50862512928.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9496/6429/files/shahrzad_2_part_15_full.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9854/6084/files/tejoj.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_off00005478.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5478 5336 bytes
SHA-256: 3b26cddfd684ae3dd1d6c6f2f8e242838226be556c8829d7f4cf8ad881d76292
font_01_sfnt_off00006675.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6675 10644 bytes
SHA-256: b43a4d565e283c44940ec9ddee6d46fadfe013e28ecba89146089bad9fa0d7b3

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