Malicious PDF — malware analysis report

Static analysis result for SHA-256 212b39a16a1da22e…

MALICIOUS

PDF

42.0 KB Created: 2020-08-20 19:02:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: aab4f1ee0ddccad28a5d77a5503519d8 SHA-1: 73d4f83111141340c05f399f024709e249bf0009 SHA-256: 212b39a16a1da22e4fd07a598e843c4ce14d35a826591174eef79fec17cec800
150 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with a primary link pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.cc/pify?keyword=bio+essay+template', suggesting a lure for users seeking essay templates. The PDF's structure and the presence of numerous links to external PDFs hosted on various domains indicate a campaign to distribute malicious content. No scripts were extracted, limiting the analysis of direct execution capabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.cc/pify?keyword=bio+essay+template
    • http://files.nest-of-the-rat-king.com/uploads/1/3/0/8/130874318/vomarazonodidimuniz.pdf
    • http://files.tapcanada.com/uploads/1/3/0/7/130775828/jimabakiwisimus.pdf
    • http://files.evelynhsullivanmediation.com/uploads/1/3/0/7/130739379/6103de01325.pdf
    • https://cdn.shopify.com/s/files/1/0437/0202/6393/files/bofovodurezudesiwuvekavu.pdf
    • https://cdn.shopify.com/s/files/1/0435/8687/9651/files/30706685834.pdf
    • https://cdn.shopify.com/s/files/1/0428/1883/0503/files/zebeketowumem.pdf
    • https://cdn.shopify.com/s/files/1/0429/8643/8807/files/natobupesewepunikujo.pdf
    • https://cdn.shopify.com/s/files/1/0431/7587/0630/files/rusatanokaxavezo.pdf
    • https://cdn.shopify.com/s/files/1/0436/5792/0677/files/52275047108.pdf
    • https://cdn.shopify.com/s/files/1/0431/9654/7230/files/verizon_fios_channel_lineup_2016.pdf
    • https://cdn.shopify.com/s/files/1/0432/9403/2025/files/python_list_average.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/98973723668.pdf
    • https://cdn.shopify.com/s/files/1/0435/5502/9141/files/wotupuxasexaju.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_off00006a06.bin
a2435991c26c4d16ce61d35307d6d4bcab4291b43f68c296125c73813cea11a4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A06 5020 bytes
font_01_sfnt_off00007b11.bin
716b8fe7afc912143f574e06f1896b55ca776fd8d1739abdc00e144fdcab9178		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B11 9696 bytes

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