Malicious PDF — malware analysis report

Static analysis result for SHA-256 c67b2c003d18e1bb…

MALICIOUS

PDF

79.0 KB Created: 2020-08-04 10:44:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5cb0554df96d245dcc7fb99061280116 SHA-1: 5d0c27fb1ed441fa96a5e764d16c9dd9a04e60c2 SHA-256: c67b2c003d18e1bb412ef83ca15ec4ee6b8c43731d364fa4fbeabfde20d229be
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=biocombustibles+definicion+pdf'. This URL is likely used to redirect the user to a malicious site. The document body, though heavily obfuscated, contains text related to 'Biocombustibles definicion pdf', suggesting a lure. The presence of numerous external PDF links, many hosted on Shopify, indicates a link farm strategy to improve search engine ranking for malicious content.

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=biocombustibles+definicion+pdf
    • http://files.igseries.com/uploads/1/3/1/6/131607163/4341353.pdf
    • http://files.pollypanda.com/uploads/1/3/1/4/131407459/momurububutij_tatifomuwonoser_zulumozojal_balob.pdf
    • http://files.theskinthatburns.com/uploads/1/3/1/1/131164534/f66e7e2f6bf.pdf
    • http://files.viszolaygallery.com/uploads/1/3/2/6/132696274/boluzatozawur.pdf
    • http://files.whitepeacockcoffee.com/uploads/1/3/1/4/131436971/7dad80.pdf
    • https://cdn.shopify.com/s/files/1/0428/5035/3318/files/51139582287.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/pisanebemewamabojesodid.pdf
    • https://cdn.shopify.com/s/files/1/0430/4217/7181/files/78520549605.pdf
    • https://cdn.shopify.com/s/files/1/0431/2632/5402/files/58105546291.pdf
    • https://cdn.shopify.com/s/files/1/0436/4884/3929/files/present_simple_worksheet_with_answers.pdf
    • https://cdn.shopify.com/s/files/1/0428/2381/1239/files/56172427397.pdf
    • https://cdn.shopify.com/s/files/1/0430/3863/8241/files/50285009782.pdf
    • https://cdn.shopify.com/s/files/1/0432/4435/5739/files/jutazexonulaf.pdf
    • https://cdn.shopify.com/s/files/1/0431/5539/0630/files/47044527213.pdf
    • https://cdn.shopify.com/s/files/1/0433/1195/6126/files/10329896364.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xakikalimakimoxe.pdf
    • https://cdn.shopify.com/s/files/1/0427/9812/1119/files/88551042665.pdf
    • https://cdn.shopify.com/s/files/1/0437/0235/4070/files/54425960394.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_off0000f9c4.bin
dc94cde744afcfb5dc7a23a18de27d090f6b6cf3e77dea0a3ecc30a05c46b023		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF9C4 5184 bytes
font_01_sfnt_off00010b56.bin
631fca4f44b989bbb981cdb415365a5bc12b136b29326d20dd8a88b4f652da8c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10B56 10456 bytes

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