Malicious PDF — malware analysis report

Static analysis result for SHA-256 464ad38dce2ae150…

MALICIOUS

PDF

46.0 KB Created: 2020-08-17 00:41:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ab0b39da9ce79fdde8d177eb1103d437 SHA-1: 5fb8bb06fea5ee15bbfdf920a0e3fdccb3b6a514 SHA-256: 464ad38dce2ae150e041936e9f68e0da777a27007ca1229be843f7e1ce6ebec1
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a link farm hosted on cdn.shopify.com. One of these links, https://ttraff.cc/pify?keyword=business+definition+economics+pdf, is identified as a malicious redirector. The document body, though heavily obfuscated, appears to contain references to the malicious URL and other PDF files, suggesting a lure to external malicious content. The ML classifier also strongly indicated maliciousness.

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=business+definition+economics+pdf
    • http://files.oldgoatlures.com/uploads/1/3/0/9/130969003/c113adc.pdf
    • http://files.texasconex.com/uploads/1/3/1/1/131164479/zojifar.pdf
    • http://debiwopav.weddingcarhireauckland.co.nz/uploads/1/3/0/8/130874012/ripopigikosum.pdf
    • https://cdn.shopify.com/s/files/1/0431/5083/5876/files/fefigulisuzebezajof.pdf
    • https://cdn.shopify.com/s/files/1/0431/1685/5453/files/les_calligrammes.pdf
    • https://cdn.shopify.com/s/files/1/0434/8890/3325/files/87788459225.pdf
    • https://cdn.shopify.com/s/files/1/0429/0645/2127/files/bioelectricity_a_quantitative_approach_3rd_edition.pdf
    • https://cdn.shopify.com/s/files/1/0430/4361/8965/files/xufiwa.pdf
    • https://cdn.shopify.com/s/files/1/0451/3690/4346/files/19317304523.pdf
    • https://cdn.shopify.com/s/files/1/0431/1449/6161/files/aircraft_structure_book.pdf
    • https://cdn.shopify.com/s/files/1/0437/9279/3757/files/blackstone_real_estate_partners_asia.pdf
    • https://cdn.shopify.com/s/files/1/0435/1705/1048/files/67700269046.pdf
    • https://cdn.shopify.com/s/files/1/0432/5857/7064/files/69802569123.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_off00007732.bin
f1ac5bd40aa4f09b5aaab151e3a9c7495f5d1ac7a24e640d88ab19e7a5e94afa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7732 5012 bytes
font_01_sfnt_off00008834.bin
c1eeeec7af4ce41f651bfe9c94ab5066d6dba305780ab089468d7402855529b1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8834 10312 bytes

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