Malicious PDF — malware analysis report

Static analysis result for SHA-256 947cdde30d2eaf66…

MALICIOUS

PDF

40.0 KB Created: 2020-08-10 02:39:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: abed8d2ff9cbadc78db4cedae5ef000f SHA-1: d4cc54fedc1a6813190caa874677b75c80e1d3cb SHA-256: 947cdde30d2eaf66d6ea83e645ed1901edde5b877538061a683cea6e71be267d
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains numerous embedded links, with a critical heuristic identifying a malicious redirector at 'https://ttraff.cc/pify?keyword=vexel+art+tutorial+pdf'. The document body, though heavily obfuscated, contains references to the same URL and other Shopify-hosted PDFs, suggesting a link farm or SEO poisoning tactic. The ML classifier strongly indicates maliciousness, supporting the conclusion that this PDF is designed to redirect users to harmful content.

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=vexel+art+tutorial+pdf
    • http://files.danielmarkos.com/uploads/1/3/1/3/131381612/c3879950b.pdf
    • http://files.tabersafehaven.ca/uploads/1/3/2/6/132696214/wekojosasupeti_nonawupemulawa_jonijokap.pdf
    • http://files.artwithintention.org/uploads/1/3/0/7/130776589/vilim.pdf
    • http://files.tenthreecleaning.co.uk/uploads/1/3/0/7/130740547/635899e3bb212.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/wanojexabe.pdf
    • https://cdn.shopify.com/s/files/1/0429/0114/3715/files/lekorugadojosewumonolo.pdf
    • https://cdn.shopify.com/s/files/1/0434/7373/1741/files/zuzexovek.pdf
    • https://cdn.shopify.com/s/files/1/0431/7885/2507/files/8624210092.pdf
    • https://cdn.shopify.com/s/files/1/0433/4495/3509/files/95151153919.pdf
    • https://cdn.shopify.com/s/files/1/0432/3105/1931/files/lusaxom.pdf
    • https://cdn.shopify.com/s/files/1/0430/7927/0561/files/6489159804.pdf
    • https://cdn.shopify.com/s/files/1/0436/1083/3058/files/adawat_novel.pdf
    • https://cdn.shopify.com/s/files/1/0432/4088/2340/files/literary_periods_of_english_literature.pdf
    • https://cdn.shopify.com/s/files/1/0430/8277/6725/files/87767914627.pdf
    • https://cdn.shopify.com/s/files/1/0430/7858/2439/files/pisciculture_intensive.pdf
    • https://cdn.shopify.com/s/files/1/0437/1418/3323/files/34952387994.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_off00005fef.bin
44a8e3aa37180523bb56bd142b1d73f9f719e5d9e1bf08b2abc23be3ce387355		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5FEF 4888 bytes
font_01_sfnt_off000070a8.bin
3875f817da7d1d30a5a87eba23b26e3f571b4854025b6b2895e5a8d0d6cacfb4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x70A8 10124 bytes

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