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)
MD5: 8b2d725e611b5adf0556065dc64458ec SHA-1: 6233a2b3693bb1661c016e963d318864b91b6230 SHA-256: 55cc2387d8684ad67d6b8a295831f68cb68a4143efca0e02d68de75d07b9a474
120 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.

Heuristics 3

  • 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.
  • 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
    • http://files.hallfamilytherapy.com/uploads/1/3/0/8/130813100/c0215c.pdf
    • http://vipat.westvirginiaballroom.com/uploads/1/3/0/8/130814933/luzemit_fiwaf.pdf
    • http://files.coffeesonme.com/uploads/1/3/1/8/131857199/xamefopekoxorunofase.pdf
    • https://cdn.shopify.com/s/files/1/0431/7757/4562/files/gobuvedunu.pdf
    • https://cdn.shopify.com/s/files/1/0433/1431/5422/files/final_fantasy_1_strategy_guide.pdf
    • https://cdn.shopify.com/s/files/1/0434/3214/9148/files/nekesexanowowulofobo.pdf
    • https://cdn.shopify.com/s/files/1/0432/9177/1046/files/boxafikufotivigiw.pdf
    • https://cdn.shopify.com/s/files/1/0431/0335/5034/files/18756786826.pdf
    • https://cdn.shopify.com/s/files/1/0432/6955/4329/files/36254804226.pdf
    • https://cdn.shopify.com/s/files/1/0434/8837/9032/files/kejoxoxonelusilo.pdf
    • https://cdn.shopify.com/s/files/1/0433/9240/1558/files/bacopa_monnieri_medicinal_uses.pdf
    • https://cdn.shopify.com/s/files/1/0427/4801/8855/files/6783744031.pdf
    • https://cdn.shopify.com/s/files/1/0431/1724/8672/files/32803668411.pdf
    • https://cdn.shopify.com/s/files/1/0437/2817/5265/files/kabokizite.pdf
    • https://cdn.shopify.com/s/files/1/0437/3141/9287/files/nirokurubez.pdf
    • https://cdn.shopify.com/s/files/1/0431/6777/6919/files/21325574181.pdf
    • https://cdn.shopify.com/s/files/1/0436/1207/8243/files/16068612688.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000049c3.bin
e64442cdbaa96d112490570dc0c0580fd3e36339931f4d12838929d67778c738		 pdf-font-stream PDF embedded font (sfnt) at offset 0x49C3 4892 bytes
font_01_sfnt_off00005a76.bin
e8e8ce8b6c0ee9bfc68d2ab250cc9aa8df7179ff8cb32eeb064d606219f75cab		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A76 9504 bytes

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