Malicious PDF — malware analysis report

Static analysis result for SHA-256 bac142e460fad07c…

MALICIOUS

PDF

45.0 KB Created: 2020-08-29 18:28:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b12b9b38dc74fa9c8c4fc8af6c4846b6 SHA-1: 1f0bcbceead898836e5d4792f087ed7ecdf8f384 SHA-256: bac142e460fad07c431b079c69b40f8b497ecd6333b12f38cc154b27b4dc9fbc
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/wix?keyword=flash+cs5+descargar'. This URL is presented within the document body, suggesting a lure to download software. The PDF also contains a large number of embedded links, many hosted on shopify.com, indicating a link farm strategy. The ML classifier strongly flagged this PDF as malicious.

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/wix?keyword=flash+cs5+descargar
    • https://cdn.shopify.com/s/files/1/0430/2631/7473/files/26665673374.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/jonamov.pdf
    • https://cdn.shopify.com/s/files/1/0435/9503/8877/files/47694972857.pdf
    • https://cdn.shopify.com/s/files/1/0450/4082/8566/files/scion_xb_pioneer_radio_manual.pdf
    • https://cdn.shopify.com/s/files/1/0432/3013/4427/files/wutelezago.pdf
    • https://static.usrfiles.com/ugd/b8c837_cbc5e3862fbb4f33a04e616334c88122.pdf
    • https://static.usrfiles.com/ugd/07625c_e17f6e1cde70404aa04ed625b8b2db7b.pdf
    • https://static.usrfiles.com/ugd/a6e5e9_93ce8a7f9c6f429cb48f8e120ca20efd.pdf
    • https://static.usrfiles.com/ugd/b8c837_008fd272bb57404784e4a5b0f62817a9.pdf
    • https://static.usrfiles.com/ugd/b8c837_d9843def85c248e6a25c0dfb447b3b62.pdf
    • https://cdn.shopify.com/s/files/1/0433/0009/4112/files/sony_handycam_dcr_sx65.pdf
    • https://cdn.shopify.com/s/files/1/0432/5851/1510/files/widomapupifepozerisoxaku.pdf
    • https://cdn.shopify.com/s/files/1/0439/4647/5675/files/cateye_padrone_cycling_computer_cc-_pa100w_manual.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/87899810879.pdf
    • https://cdn.shopify.com/s/files/1/0431/2950/3908/files/action_games_apk_data.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_off0000641a.bin
da62f1b49fd042654d8228d93e1afe98123fc76fae57b349a2b5cd8b5fdd406e
pdf-font-stream PDF embedded font (sfnt) at offset 0x641A 4724 bytes
font_01_sfnt_off0000742d.bin
f0ab52c76fabfe74238bfabc5ad81840e382456f5342f49509147f9f080e8dfd
pdf-font-stream PDF embedded font (sfnt) at offset 0x742D 11024 bytes
font_02_sfnt_off00009961.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2
pdf-font-stream PDF embedded font (sfnt) at offset 0x9961 4324 bytes