Malicious PDF — malware analysis report

Static analysis result for SHA-256 59bca1c7c1b0e27f…

MALICIOUS

PDF

40.9 KB Created: 2020-09-01 22:41:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a8b82d8b92f25391e73263f2722fc189 SHA-1: 39e1516414e9591a6e073499fe96f4f4c08f7408 SHA-256: 59bca1c7c1b0e27f947259946de8fb4ec1d31cca0864ccfb9362ce05dda975c0
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. This redirector is disguised with a keyword related to a service manual, suggesting a lure to trick users into clicking. The ML classifier also strongly flagged this PDF as malicious. The primary attack pattern involves a link farm designed to funnel users to malicious 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.link/wix?keyword=2012+club+car+carryall+service+manual
    • https://cdn.shopify.com/s/files/1/0429/9502/4023/files/aimbot_pubg_mobile_ios.pdf
    • https://cdn.shopify.com/s/files/1/0437/7519/7346/files/turepuzez.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kevaziretojigadogikoranab.pdf
    • https://cdn.shopify.com/s/files/1/0430/9165/6864/files/brazil_flag_hd_wallpaper_2018.pdf
    • https://cdn.shopify.com/s/files/1/0429/3358/4028/files/56253831164.pdf
    • https://static.usrfiles.com/ugd/0cd3a8_2b1c4a35b1ed4e8383d047b6907a89ef.pdf
    • https://static.usrfiles.com/ugd/902d29_d949cb43255a4d798c4b95c4421b18f6.pdf
    • https://static.usrfiles.com/ugd/51c472_0ab376fc3fa74636baa916905fcebd55.pdf
    • https://static.usrfiles.com/ugd/b8c837_93879a5317f44462a68c02a82ce7a5da.pdf
    • https://static.usrfiles.com/ugd/a382ee_8e70858534bb490ba4a2cce06c3a97fd.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/97253363073.pdf
    • https://cdn.shopify.com/s/files/1/0431/2930/7287/files/kinozalo.pdf
    • https://cdn.shopify.com/s/files/1/0433/3328/8088/files/zudabegogoril.pdf
    • https://cdn.shopify.com/s/files/1/0431/6754/7546/files/twentieth_century_analytic_philosophy.pdf
    • https://cdn.shopify.com/s/files/1/0427/6027/4087/files/android_pie_lg_g6.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_off000057b1.bin
65247aaebfd882f685ed9b6bea9dc53ac4d1485c8f8bcabf866370a54d9e5479		 pdf-font-stream PDF embedded font (sfnt) at offset 0x57B1 5476 bytes
font_01_sfnt_off00006a4b.bin
da6e918c5eff1aa8998763deea4daede1737650fb1e728d80ec188956d237ae6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A4B 14276 bytes

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