Malicious PDF — malware analysis report

Static analysis result for SHA-256 df7b0223a82c0a97…

MALICIOUS

PDF

46.1 KB Created: 2020-08-14 10:59:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 01aa0305d56e332f05754cf321f5cf8f SHA-1: be387ef1713c3f1705ea26ae535e057fbccfbdc8 SHA-256: df7b0223a82c0a97cd5853d16e91cba17b9506b928b9790d75e77d3734a2f9a3
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 pointing to 'https://ttraff.com/wb?keyword=bobinado%20de%20motores%20electricos%20trifasicos%20pdf'. Additionally, it exhibits characteristics of a PDF SEO link farm, with numerous links to external PDFs, including one hosted on Shopify. The ML classifier strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains the malicious redirector URL and several benign-looking Shopify URLs, suggesting a lure to a malicious site.

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.com/wb?keyword=bobinado%20de%20motores%20electricos%20trifasicos%20pdf
    • http://files.jimburnsarchitect.com/uploads/1/3/1/3/131379846/4116433.pdf
    • http://bagiloxu.karronlab.com/uploads/1/3/0/9/130969011/dovaxufonuxozano.pdf
    • http://newokotal.castgurl.com/uploads/1/3/1/3/131380005/3167672.pdf
    • https://cdn.shopify.com/s/files/1/0433/9243/4326/files/ipl_2020_list_file_download.pdf
    • https://cdn.shopify.com/s/files/1/0429/8565/2375/files/wopatinikowupasakev.pdf
    • https://cdn.shopify.com/s/files/1/0427/8226/1415/files/78151765030.pdf
    • https://cdn.shopify.com/s/files/1/0427/6181/4172/files/52454021948.pdf
    • https://cdn.shopify.com/s/files/1/0438/2310/4162/files/43956564905.pdf
    • https://cdn.shopify.com/s/files/1/0435/9408/8611/files/schneider_mccb_catalogue_2020.pdf
    • https://cdn.shopify.com/s/files/1/0432/7807/4022/files/bioremediation_in_wastewater_treatment.pdf
    • https://cdn.shopify.com/s/files/1/0436/6978/2693/files/ruzukapezibexubetasak.pdf
    • https://cdn.shopify.com/s/files/1/0431/9127/1586/files/pozisi.pdf
    • https://cdn.shopify.com/s/files/1/0437/3640/0037/files/72129108363.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000065cc.bin
a03389c65a76e2d4a40cb3394424e5df61e67694528e6f613246be207d52c2b8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x65CC 1696 bytes
font_01_sfnt_off00006df7.bin
a0a9c97c464aca25a8c86c64ec4b1965fd7410fc1ed7db48f3a62330b498a0e9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6DF7 5492 bytes
font_02_sfnt_off0000807e.bin
41db0d5c77ea45ccc00fe1293e516974e693dbef8c0eba6d5c77e1b143b2e4cc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x807E 13320 bytes

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