Malicious PDF — malware analysis report

Static analysis result for SHA-256 b59073eeaab4c6b3…

MALICIOUS

PDF

43.4 KB Created: 2020-08-24 21:25:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bcfe26a4494cbdf540f32f09fca7ed84 SHA-1: 08b321092d5a368fc4b4ab449c9bb257456014a8 SHA-256: b59073eeaab4c6b3830abf22e339ff29b1be40552c146971f199accbbd68116b
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, which is also present in the document body. This link, 'https://ttraff.cc/pify?keyword=free+nkjv+study+bible+app+for+android', is designed to lure users with a fake offer. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs pointing to external resources, many of which are hosted on Shopify. The ML classifier strongly supports the malicious nature of this PDF.

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=free+nkjv+study+bible+app+for+android
    • http://files.whitesschoolfordogs.com/uploads/1/3/0/8/130873945/7359147.pdf
    • http://files.vitalityleap.com/uploads/1/3/2/7/132741334/5927264.pdf
    • http://xokukat.marinetaverndawlish.com/uploads/1/3/1/3/131384536/a90696.pdf
    • http://bajumeg.sawvc.com/uploads/1/3/1/4/131483281/e330674b9.pdf
    • https://cdn.shopify.com/s/files/1/0430/0773/8019/files/sekiro_ashina_sake.pdf
    • https://cdn.shopify.com/s/files/1/0436/5382/4677/files/4863019129.pdf
    • https://cdn.shopify.com/s/files/1/0432/9711/2219/files/8597345930.pdf
    • https://cdn.shopify.com/s/files/1/0438/3460/5728/files/21816747189.pdf
    • https://cdn.shopify.com/s/files/1/0439/0957/8907/files/19925475436.pdf
    • https://cdn.shopify.com/s/files/1/0437/6517/0334/files/exclamation_sentences_worksheets_for_first_grade.pdf
    • https://cdn.shopify.com/s/files/1/0430/0826/2297/files/calcined_clays_for_sustainable_concrete.pdf
    • https://cdn.shopify.com/s/files/1/0433/4767/3253/files/80453057556.pdf
    • https://cdn.shopify.com/s/files/1/0430/5960/9753/files/ms_word_quote_template.pdf
    • https://cdn.shopify.com/s/files/1/0434/0878/5562/files/30936818781.pdf
    • https://cdn.shopify.com/s/files/1/0432/2007/4657/files/76090726914.pdf
    • https://cdn.shopify.com/s/files/1/0429/2290/1663/files/photoshop_how_to_unlock_layer.pdf
    • https://cdn.shopify.com/s/files/1/0434/3817/8470/files/aulad_ke_huqooq_in_urdu.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_off00006a36.bin
7c4358efb9ed75a468bd6c1e09749fa3360446b1c1323c475835c00ea363dea4
pdf-font-stream PDF embedded font (sfnt) at offset 0x6A36 5432 bytes
font_01_sfnt_off00007cca.bin
3a8cc399f176219abb5fc637b5439ab1b159572c4cd4eca142582b65b4ca0ad8
pdf-font-stream PDF embedded font (sfnt) at offset 0x7CCA 10456 bytes