Malicious PDF — malware analysis report

Static analysis result for SHA-256 23345867b8286605…

MALICIOUS

PDF

70.2 KB Created: 2020-08-06 04:51:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 02f37b7a33f18b1206bb5ed21a049682 SHA-1: 2137ec82a4df029cfd71cc1b21bb0a129d80ff9a SHA-256: 23345867b8286605021cdb9bbd06c05d75b3562304c7691cd27381cf53276938
202 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link and a large number of external PDF links, suggesting a link farm SEO tactic to distribute malicious content. The presence of a 'download' button lure further supports this. The primary malicious URL identified is https://ttraff.com/wb?keyword=bio%20pdf%20download%20free, which likely leads to further malicious content or exploits. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.com/wb?keyword=bio%20pdf%20download%20free In PDF document text
    • http://kujuz.peakphotographyllc.com/uploads/1/3/1/4/131437689/xelofolelo_sikufisorigu.pdfIn PDF document text
    • http://zowexel.theopenuniversalist.com/uploads/1/3/0/9/130969332/9065175.pdfIn PDF document text
    • http://files.abelsaucedo.com/uploads/1/3/2/8/132814371/nuwujux-bowinizozav.pdfIn PDF document text
    • http://files.mealsonwheelssb.org/uploads/1/3/0/9/130969498/a839d36.pdfIn PDF document text
    • http://files.juliacellini.com/uploads/1/3/0/8/130815664/kudisofanosabu.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/1/0433/0687/7080/files/sozolomunegodufedawugiwe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0949/8536/files/wepevo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/0905/4619/files/moxoxamupulezizu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2943/8370/files/61659351513.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0311/7719/files/can_google_maps_show_zip_codes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4610/9345/files/bovoxemimibisovebunoki.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9502/4033/files/nizadawaw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1705/1048/files/samsung_allshare_cast.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4772/1892/files/pearson_biochemistry_textbook.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3062/5947/files/58743818015.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7151/2480/files/nosobuluw.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 8

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_off0000d55c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD55C 4996 bytes
SHA-256: 898fa97f7fe020b8cfdf70365ebf971250bd7b8025688dfff02efdc399056958
font_01_sfnt_off0000e681.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE681 11036 bytes
SHA-256: 6b9c2d7c6b338b494423c5a2199609096a63963d76592fdbc962e90a42067979

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