Malicious PDF — malware analysis report

Static analysis result for SHA-256 86b4937cea33ac8a…

MALICIOUS

PDF

60.9 KB Created: 2020-08-07 08:11:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bddd4c474273b156e6cb0f7157871dfb SHA-1: 5188fc436b710c31ac21915768829027c3fc4957 SHA-256: 86b4937cea33ac8a4e37c175fa372cebd8dbf0e4245b2c5aba372ac01cc9e44c
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 'ttraff.com'. Additionally, it exhibits characteristics of a link farm, with numerous embedded URLs, many hosted on Shopify. The ML classifier strongly flagged this PDF as malicious. The embedded URL 'https://ttraff.com/pify?keyword=chemistry+of+polycyclic+aromatic+hydrocarbons+pdf' is the primary indicator of malicious intent, likely serving as a gateway to a phishing or malware distribution 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/pify?keyword=chemistry+of+polycyclic+aromatic+hydrocarbons+pdf
    • http://files.eldaag2019.com/uploads/1/3/2/6/132682627/4689018.pdf
    • http://files.mindbodyspirit-yoga.com/uploads/1/3/0/7/130775220/wademuvusa.pdf
    • http://files.riveterlaw.com/uploads/1/3/1/6/131636988/77a5768.pdf
    • http://files.spanish-charts.com/uploads/1/3/1/8/131856706/sagosidukew_jojalogopit_bolat.pdf
    • https://cdn.shopify.com/s/files/1/0427/5588/3175/files/risewazumisow.pdf
    • https://cdn.shopify.com/s/files/1/0440/8305/2696/files/tutorials_point_computer_networks.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/91300886864.pdf
    • https://cdn.shopify.com/s/files/1/0435/5896/1315/files/jeriguzixivinalosuxudel.pdf
    • https://cdn.shopify.com/s/files/1/0434/0006/9285/files/gowezanapelarosigobejiso.pdf
    • https://cdn.shopify.com/s/files/1/0433/5117/9416/files/zodamasog.pdf
    • https://cdn.shopify.com/s/files/1/0436/1266/8066/files/10578232265.pdf
    • https://cdn.shopify.com/s/files/1/0431/2521/1296/files/voa_e5_8d_ab_e8_a7_86.pdf
    • https://cdn.shopify.com/s/files/1/0433/9567/8359/files/ruby_json_pretty_print.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/duliwoledemovaj.pdf
    • https://cdn.shopify.com/s/files/1/0433/6982/4414/files/rijofig.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_off0000a9ff.bin
e148594e740ec35cd55823991ad9325bef1cbdbb8b8769c7a92cbdec65c021b6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA9FF 5540 bytes
font_01_sfnt_off0000bca9.bin
20d2d38aa7d797b294a677e7cfbfc61d9dc12a8ee07be1d604acdbba20b07e50		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBCA9 12672 bytes

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