Malicious PDF — malware analysis report

Static analysis result for SHA-256 d164156044d5798a…

MALICIOUS

PDF

42.0 KB Created: 2020-08-11 07:42:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b4cad0dce1abde10b674dbdba8af0288 SHA-1: 895252b71e0552b5fd552d9254088f605d0793f8 SHA-256: d164156044d5798a5da92aa2bfd15aaa4120200fadb15cb64a031c6eec60f2a9
150 Risk Score

Malware Insights

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

The PDF contains numerous links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the target URL and other PDF-related strings, suggesting a lure to download further malicious content. The presence of multiple PDF links, many hosted on Shopify, indicates a link farm strategy to improve search engine visibility for malicious 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=aliran+marxisme+pdf
    • http://tapukexi.decadesboutique.com/uploads/1/3/2/6/132680813/koxizonovizewefu.pdf
    • http://files.friedmanfrost.com/uploads/1/3/0/7/130739806/3ed6e28a4.pdf
    • http://files.therecoveryfestival.co.uk/uploads/1/3/1/6/131637919/gaxedobikugu.pdf
    • http://files.themobilityfactory.eu/uploads/1/3/1/4/131437676/rabubixi_lamazi.pdf
    • http://files.westernshirtsnz.com/uploads/1/3/2/8/132814306/6310191.pdf
    • https://cdn.shopify.com/s/files/1/0433/4603/4846/files/2012_vw_jetta_tdi_owners_manual.pdf
    • https://cdn.shopify.com/s/files/1/0438/9784/7976/files/pdf_file_convert_to_jpeg.pdf
    • https://cdn.shopify.com/s/files/1/0447/2075/0745/files/austin_kleon_roba_como_un_artista.pdf
    • https://cdn.shopify.com/s/files/1/0431/9540/0356/files/les_autres_et_moi_isabelle_filliozat.pdf
    • https://cdn.shopify.com/s/files/1/0431/7010/3452/files/metawiga.pdf
    • https://cdn.shopify.com/s/files/1/0432/0742/6216/files/fafowivavapoxexerobise.pdf
    • https://cdn.shopify.com/s/files/1/0428/9101/8396/files/kefiruda.pdf
    • https://cdn.shopify.com/s/files/1/0434/0026/5878/files/angularjs_http._get_example.pdf
    • https://cdn.shopify.com/s/files/1/0446/7671/0563/files/elite_4_fire_red.pdf
    • https://cdn.shopify.com/s/files/1/0441/0081/2952/files/skip_everfi_videos.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_off000067ba.bin
856d2fb013d93761b4c33e759b8f95ab282a6c8c9b4f05060e6be6cbe6086e36		 pdf-font-stream PDF embedded font (sfnt) at offset 0x67BA 5244 bytes
font_01_sfnt_off0000796c.bin
2d3f16b128a454bc34196f09eea62be74433ddebe6f7f9b3967f1452fe0312df		 pdf-font-stream PDF embedded font (sfnt) at offset 0x796C 9920 bytes

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