Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b373146eeb05b8d…

MALICIOUS

PDF

41.9 KB Created: 2020-09-23 13:49:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 00cc21177dd2c554b212319e31090c86 SHA-1: b2a6ab84777701bd0e0280781f7d47ea5485d4b8 SHA-256: 2b373146eeb05b8ddf0ab488b8555036d563a1341e116f72c70ed5e99429167e
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a large number of embedded links, many of which point to external PDF files, suggesting a link farm or SEO poisoning attempt. One of the primary links, https://ttraff.com/wix?keyword=haiti+area+code+phone+numbers, is flagged as a malicious redirector. The document body, though heavily obfuscated, contains this URL, indicating the likely intent is to redirect users to malicious content under the guise of providing phone number information. The ML classifier strongly supports the malicious nature of this PDF.

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/wix?keyword=haiti+area+code+phone+numbers
    • https://60c8c1c5-18a8-4967-9491-67fd7314fbf1.filesusr.com/ugd/9c66ff_b4a75d16f4a44b1aa37a6856851c4897.pdf?index=true
    • https://f7c4ffb3-3f47-439b-94bb-032d77751bf0.filesusr.com/ugd/405339_e6f762b4221b4303a48c8974539dd8b7.pdf?index=true
    • https://650783c6-e0f0-417a-b50d-50dc24a1fcf1.filesusr.com/ugd/9734e7_a948e52af2114276a645c000ea78763d.pdf?index=true
    • https://4de04d02-62d6-44db-bd34-5986e1b65b4c.filesusr.com/ugd/0010c8_434ce4f9fe3c4bc8a93d4f151e4091c6.pdf?index=true
    • https://921385da-e5b6-402a-86c3-9e9f63704ccc.filesusr.com/ugd/9eb187_276bc14f38eb4ff5aeaf3c5403254eb2.pdf?index=true
    • https://274767e2-08c1-4ae0-bb19-21a24203fd98.filesusr.com/ugd/760101_5c3f6e0996c14b82acc1166e1ecb4c1a.pdf?index=true
    • https://1719c139-aee1-4d14-87b8-1ecadabd34f5.filesusr.com/ugd/e3c460_65120d5638464579a4d20e1bfe45c431.pdf?index=true
    • https://7a6898a9-7e84-41c3-823e-cb98032ad8f7.filesusr.com/ugd/fc840b_5e993a47eabb45429884d7759db84674.pdf?index=true
    • https://9637ba49-6e78-4eaa-8778-1c888cdc316c.filesusr.com/ugd/67e251_4536c54fe128432192e3bfc2330be343.pdf?index=true
    • https://74265b4c-9cba-42bb-ae71-3ed9d4b35733.filesusr.com/ugd/15d534_6016ce368af64dc098005ad969e530b1.pdf?index=true
    • https://69079e80-be37-45ae-950d-45de372960d2.filesusr.com/ugd/49f5ef_7a15327a17834d629ac8473e32a3945e.pdf?index=true
    • https://b2be5a41-0baf-4a6b-9e6a-13379257ab75.filesusr.com/ugd/02af14_4e16d156864a46a98678afcd484dfa2e.pdf?index=true
    • 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_off000065cd.bin
488610e4b84726399959188c7bfe99f6699a01ce3300acb6047e962e0efe878a
pdf-font-stream PDF embedded font (sfnt) at offset 0x65CD 5380 bytes
font_01_sfnt_off000077e0.bin
a0a49909da3fbaae8263aaed9597ef07467a604a8d5587e169f9c4086d1a18d9
pdf-font-stream PDF embedded font (sfnt) at offset 0x77E0 10336 bytes