Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8efda5142b29188…

MALICIOUS

PDF

49.4 KB Created: 2020-08-30 15:03:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c1e1f447a1768c869b8726dba68e1cf7 SHA-1: 01a1992f6a376ddd8a200723fd6abc18ca621229 SHA-256: d8efda5142b29188d909fb1178c57de10f0aecbd235d7ba566ba8905320ff789
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.cc/wix?keyword=machinist+job+guide+ffxiv'. This URL is likely used to redirect the user to a malicious site. The document body, though heavily obfuscated, contains references to this URL and a large number of other PDF links, suggesting a link farm or redirection tactic. The ML classifier also 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=machinist+job+guide+ffxiv
    • https://static.usrfiles.com/ugd/8b9728_2be2fa989c9d496a9d5dfd29b87e0cfd.pdf
    • https://static.usrfiles.com/ugd/aef5b7_0513f1fa837b4be28b5e870ae8d33abb.pdf
    • https://static.usrfiles.com/ugd/0047a4_ba4504fac9ed4c45929114a385fffc56.pdf
    • https://static.usrfiles.com/ugd/b8c837_d7e4032911c447a1b1c289acb84cc05b.pdf
    • https://cdn.shopify.com/s/files/1/0438/4522/2550/files/angina_prinzmetal_adalah.pdf
    • https://cdn.shopify.com/s/files/1/0441/2728/9496/files/dodeponiroxaditexopasose.pdf
    • https://static.usrfiles.com/ugd/b8c837_d5254cda8ee940a693c157be1c2482af.pdf
    • https://static.usrfiles.com/ugd/b8c837_b3f9580d5f4a4fddb3f5b5633b2ac40e.pdf
    • https://static.usrfiles.com/ugd/73f3b0_b204d79eeac04dd1a4691c1d41e3a4b1.pdf
    • https://static.usrfiles.com/ugd/b8c837_5c67f7cb46ec4db4bb313ee2c5d72f4c.pdf
    • https://static.usrfiles.com/ugd/c068f8_4e436e8f21b048679bd0b0310d5e9c08.pdf
    • https://static.usrfiles.com/ugd/930050_7581cf217b544bce808c30c22db9abd4.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_off0000754c.bin
bec26df6faecbbf1fdf9dfff623af10a7d3c659605655e0d725f9b77c54a124d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x754C 5388 bytes
font_01_sfnt_off000087a3.bin
c8a655c4eca5a800c2923d9a349b6528ac9a1f21c40b1c9c52286e2f3409db2b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x87A3 10296 bytes
font_02_sfnt_off0000aaf3.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAAF3 4324 bytes

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