Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3fc6f79cd6261e0…

MALICIOUS

PDF

39.0 KB Created: 2020-09-09 21:12:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: aae509dabe27d1209b56f5838bdd8a2d SHA-1: 8e871645985fc4849f8d8fef7a47505c9e0e07b2 SHA-256: d3fc6f79cd6261e04e4a2db992397ed651e2499ef7eb9eb85c2e62e2e3dee10e
150 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.link, which is likely intended to lead the user to a malicious site. The document body, though heavily obfuscated, contains the same URL and other PDF links, suggesting a link farm or redirection tactic. The ML classifier also flagged this PDF with high confidence. The primary attack pattern involves social engineering through a deceptive link within the document.

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=biotransformation+in+plants
    • http://gapuleku.kroottarkmeel.com/uploads/1/3/0/8/130814238/8114710.pdf
    • https://static.usrfiles.com/ugd/1be480_1ef5ad6956964fd2aa87327c5dd73c0d.pdf
    • https://static.usrfiles.com/ugd/d78803_087a4a4e1f6444f0b3e5cef9fe9229e9.pdf
    • https://static.usrfiles.com/ugd/4b68be_baf5076f635b4b438cc778c29af70c70.pdf
    • https://static.usrfiles.com/ugd/b8c837_bf72fc765e04470a8f2e65bb3ff3554b.pdf
    • https://cdn.shopify.com/s/files/1/0433/5294/8901/files/34746210933.pdf
    • https://cdn.shopify.com/s/files/1/0433/4354/4488/files/economic_and_social_issues_for_nabard_exam.pdf
    • https://cdn.shopify.com/s/files/1/0438/2598/7734/files/wurazibepalatumegubo.pdf
    • https://cdn.shopify.com/s/files/1/0448/5254/3649/files/ramsey_electrical_test_study_guide.pdf
    • https://static.usrfiles.com/ugd/ba3095_efc254c2d7fd4c5aa82fed991ee8d843.pdf
    • https://static.usrfiles.com/ugd/df4650_0419fc37ac214da88cef0f4bd7575eb7.pdf
    • https://static.usrfiles.com/ugd/7198c1_cb660c6bae0145d5a9aa97092931fd97.pdf
    • https://static.usrfiles.com/ugd/fb5067_4168835484a8449eabe7dfcba48d7a41.pdf
    • https://static.usrfiles.com/ugd/b8c837_377eb5b8a1364edd89a3078e171b4596.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_off00005bae.bin
7918d75c0cb3f069fcec6e9abd3ad08e04f5fb3d6813f6f6e15d54b7f56a3633		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5BAE 5096 bytes
font_01_sfnt_off00006cee.bin
d014885cc9db6e2726222dce673914f357d08409579594fd506f3b5de2ad9781		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6CEE 10176 bytes

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