Malicious PDF — malware analysis report

Static analysis result for SHA-256 0233492407d5ecaf…

MALICIOUS

PDF

39.5 KB Created: 2020-08-26 01:51:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 96dd5f3ad13c4d35751b43512ae49db1 SHA-1: 3f96eb545cd99f57a064ce41a03aa4eb85987a88 SHA-256: 0233492407d5ecaf38092d08fbf46cec9e11b8317fb676dc254084418096911f
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic identifying it as a malicious redirector. The primary redirector URL, "https://ttraff.club/pify?keyword=christmas+brain+teasers+pdf", is directly linked to malicious activity. The document body, though heavily obfuscated, also contains this URL, suggesting an attempt to lure users to malicious content under the guise of "Christmas brain teasers". No scripts were extracted, but the presence of multiple links and the ML classifier's high confidence indicate a malicious intent, likely for phishing or malware delivery.

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.club/pify?keyword=christmas+brain+teasers+pdf In PDF document text
    • http://files.njmstudio.com/uploads/1/3/0/7/130775747/1039288.pdfIn PDF document text
    • http://files.quentinucc.org/uploads/1/3/2/3/132303045/6df92a93f03c.pdfIn PDF document text
    • http://talubupu.hdblues.org/uploads/1/3/1/4/131407668/0440d0ad9d.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/1/0434/6108/3288/files/philips_beard_trimmer_7000_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4916/5734/files/bexesunexepagifuj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6216/4644/files/lynnhaven_fishing_pier_report.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6676/1120/files/56269925624.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1022/0447/files/25601400977.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3058/4213/files/advanced_plant_ecology.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3900/6632/files/underlord_mobile_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9272/8224/files/sabidosumotagivoba.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_off00005da6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5DA6 5296 bytes
SHA-256: 333cf0ee695fe5fd661fbf2b28b10ff0cdcb4b79d3a8ca56f2c4375024d8e4d2
font_01_sfnt_off00006f73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F73 10040 bytes
SHA-256: c8614aa4ccdd18a725048cd6c42af75cb2096289355eabe806d44556acd73fa0

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