Malicious PDF — malware analysis report

Static analysis result for SHA-256 58e81e1f6c2f40e2…

MALICIOUS

PDF

52.1 KB Created: 2020-08-16 23:24:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a8ffc13a437ae6c5c44babd11e85b21b SHA-1: b1d41c4079563c3b9f31e0ea76b003637ee46168 SHA-256: 58e81e1f6c2f40e2165bbd04506b0d50cd6fb252aa386bfaf62ff86c562fb940
150 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to external resources. One critical heuristic firing indicates a malicious redirector link to 'https://ttraff.cc/pify?keyword=extron+cable+cubby+500+template'. The document body, though heavily obfuscated, also contains this URL, suggesting an attempt to lure users to a malicious site. The presence of numerous other PDF links, many hosted on Shopify, indicates a link farm strategy to improve SEO 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=extron+cable+cubby+500+template
    • http://wakowu.sdicebox.com/uploads/1/3/0/9/130969465/xateju-bopawo.pdf
    • http://files.pack482glendora.com/uploads/1/3/1/6/131606630/gimadelumitezafam.pdf
    • http://kexugut.shalomsart.com/uploads/1/3/1/1/131163599/warepunojekeg_jegajuniwajalu.pdf
    • http://files.laarmory.net/uploads/1/3/0/8/130813111/fa5337dd02.pdf
    • https://cdn.shopify.com/s/files/1/0430/4420/8797/files/9937478494.pdf
    • https://cdn.shopify.com/s/files/1/0438/6439/1845/files/6128208752.pdf
    • https://cdn.shopify.com/s/files/1/0437/1054/6071/files/audio_amplifier_circuit_project.pdf
    • https://cdn.shopify.com/s/files/1/0432/4887/7736/files/72390399276.pdf
    • https://cdn.shopify.com/s/files/1/0435/0253/4822/files/syndrome_de_gougerot_sjogren_cours.pdf
    • https://cdn.shopify.com/s/files/1/0429/9807/1450/files/tanaxofanomo.pdf
    • https://cdn.shopify.com/s/files/1/0433/6196/0091/files/data_entry_sheet_in_excel_2007.pdf
    • https://cdn.shopify.com/s/files/1/0439/8543/6830/files/34504350665.pdf
    • https://cdn.shopify.com/s/files/1/0431/3314/1146/files/sorry_miss_jackson_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/9142282406.pdf
    • https://cdn.shopify.com/s/files/1/0431/1567/5809/files/fukozukonariji.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_off00009107.bin
591e0859401dedf83d5a609d32171433badc923156f28700a0630cebe1f27aa7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9107 5432 bytes
font_01_sfnt_off0000a375.bin
f3a12fcb360fe6456a179118147e3aaaf3775e3b1b7bdeea0bd03e4a637cce3d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA375 9500 bytes

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