Malicious PDF — malware analysis report

Static analysis result for SHA-256 d30d51e119792b37…

MALICIOUS

PDF

40.4 KB Created: 2020-08-10 04:52:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9cc1d997f3b78f36f090c7f085510242 SHA-1: f3a00aed4247bad98d145fef3c311dc2f441f92a SHA-256: d30d51e119792b37b1771ccfe37cf21e612e80501b7d485ea30d15ada8908910
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 Shopify domains, but one critical link directs to a known malicious redirector. The document body, though heavily obfuscated, contains the target URL and appears to be a lure for a free PDF download. The ML classifier strongly indicates maliciousness, and the PDF redirector heuristic confirms the intent to lead the user to harmful infrastructure.

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=code+of+honor+alan+gratz+pdf+free
    • http://files.chevana.com/uploads/1/3/0/7/130740175/fejeta.pdf
    • http://files.eastafricanpartners.com/uploads/1/3/1/4/131438776/zikuvum.pdf
    • http://files.upwardfacinglife.com/uploads/1/3/1/4/131436971/velolerulamur_baxafijirun.pdf
    • https://cdn.shopify.com/s/files/1/0429/9577/7699/files/gewejaliberigo.pdf
    • https://cdn.shopify.com/s/files/1/0429/6943/2230/files/lodidabeladejepanawosa.pdf
    • https://cdn.shopify.com/s/files/1/0433/9279/4774/files/qr_codes_for_miitomo.pdf
    • https://cdn.shopify.com/s/files/1/0438/4089/7184/files/99106240854.pdf
    • https://cdn.shopify.com/s/files/1/0436/9793/0393/files/the_healing_codes.pdf
    • https://cdn.shopify.com/s/files/1/0430/4479/8613/files/95574427133.pdf
    • https://cdn.shopify.com/s/files/1/0428/3134/7868/files/90187237686.pdf
    • https://cdn.shopify.com/s/files/1/0430/6285/3794/files/fibev.pdf
    • https://cdn.shopify.com/s/files/1/0434/0521/3852/files/18869843135.pdf
    • https://cdn.shopify.com/s/files/1/0439/1187/2667/files/33802642455.pdf
    • https://cdn.shopify.com/s/files/1/0432/5471/0427/files/total_abdominal_hysterectomy_with_bilateral_salpingo_oophorectomy_procedure.pdf
    • https://cdn.shopify.com/s/files/1/0431/8819/1396/files/62309625300.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_off00006062.bin
53fa5c5b61ebb1e07d998aec1d3e36d9542038a13bd35ec009bfb24e124b2131		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6062 5080 bytes
font_01_sfnt_off000071aa.bin
8d3ce4a227af79b0a99cc811e72c9af2d9c0bb59eb7f8a1d4a21a37f3b9e08f2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x71AA 10316 bytes

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