Malicious PDF — malware analysis report

Static analysis result for SHA-256 55cc2387d8684ad6…

MALICIOUS

PDF

34.0 KB Created: 2020-08-14 11:28:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 8b2d725e611b5adf0556065dc64458ec SHA-1: 6233a2b3693bb1661c016e963d318864b91b6230 SHA-256: 55cc2387d8684ad67d6b8a295831f68cb68a4143efca0e02d68de75d07b9a474
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

This PDF document contains a large number of embedded links, many of which point to Shopify domains hosting other PDFs, suggesting a link farm for SEO manipulation. One critical heuristic identified a link to a known malicious redirector at https://ttraff.ru/pify?keyword=ch+phonics+worksheets+ks1. The document body, though heavily obfuscated, contains this same URL, indicating the primary intent is to redirect the user to malicious infrastructure. No scripts were extracted from this sample.

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.ru/pify?keyword=ch+phonics+worksheets+ks1 In PDF document text
    • http://files.hallfamilytherapy.com/uploads/1/3/0/8/130813100/c0215c.pdfIn PDF document text
    • http://vipat.westvirginiaballroom.com/uploads/1/3/0/8/130814933/luzemit_fiwaf.pdfIn PDF document text
    • http://files.coffeesonme.com/uploads/1/3/1/8/131857199/xamefopekoxorunofase.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/1/0431/7757/4562/files/gobuvedunu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1431/5422/files/final_fantasy_1_strategy_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3214/9148/files/nekesexanowowulofobo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9177/1046/files/boxafikufotivigiw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0335/5034/files/18756786826.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6955/4329/files/36254804226.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8837/9032/files/kejoxoxonelusilo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9240/1558/files/bacopa_monnieri_medicinal_uses.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4801/8855/files/6783744031.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1724/8672/files/32803668411.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2817/5265/files/kabokizite.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3141/9287/files/nirokurubez.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6777/6919/files/21325574181.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/1207/8243/files/16068612688.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_off000049c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x49C3 4892 bytes
SHA-256: e64442cdbaa96d112490570dc0c0580fd3e36339931f4d12838929d67778c738
font_01_sfnt_off00005a76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5A76 9504 bytes
SHA-256: e8e8ce8b6c0ee9bfc68d2ab250cc9aa8df7179ff8cb32eeb064d606219f75cab

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