Malicious PDF — malware analysis report

Static analysis result for SHA-256 e32e9fa564649dca…

MALICIOUS

PDF

44.5 KB Created: 2020-09-01 09:15:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a3e6558f8b7500c5bf3b478b92fad2ff SHA-1: eec63a1126048d04e31d5360ed65ef27e4f8ada0 SHA-256: e32e9fa564649dca9193450bbf76376afcc755029170b77396d959498e234582
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.ru/wix?keyword=instagram++app+ios'. Additionally, it exhibits a PDF link farm with 24 external links, many hosted on 'static.usrfiles.com'. The document body, though heavily obfuscated, contains references to these URLs, suggesting the primary intent is to redirect users to malicious content, likely for a phishing or scam operation.

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.ru/wix?keyword=instagram++app+ios
    • https://static.usrfiles.com/ugd/b8c837_9d5d4559799d4e79b77e9104af2e55d2.pdf
    • https://static.usrfiles.com/ugd/7d1dc9_4dbfd9c564f74e38be5b79c7271d53ab.pdf
    • https://static.usrfiles.com/ugd/1c90dc_8e75084c76f3446bbafe3b6b0b06ca83.pdf
    • https://static.usrfiles.com/ugd/ac51ce_6ca95c406ac644dd907a4869bcfb7fc5.pdf
    • https://static.usrfiles.com/ugd/cc089a_448314c0da3c421c9fd1931578c83261.pdf
    • https://static.usrfiles.com/ugd/b8c837_01138b9847b64762b35bb299ae6ebf02.pdf
    • https://static.usrfiles.com/ugd/b8c837_a409acdc255f47debc86f2cbc47a36cb.pdf
    • https://static.usrfiles.com/ugd/b13fd1_f334af731aea44fb88fb5936fda35a21.pdf
    • https://static.usrfiles.com/ugd/b8c837_1a844f21c1624ec0968bceebf0a1ccdb.pdf
    • https://static.usrfiles.com/ugd/97493d_64f9b48b724144f2979ea314985075dd.pdf
    • https://static.usrfiles.com/ugd/b8c837_1199727eb6db4ef891fdadd5cfa11628.pdf
    • https://static.usrfiles.com/ugd/89363e_6165d155383340e6888de59378b4806b.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_off000063f4.bin
e2ff7222488eb62f7809eac2ad9fac4467918dec6aebcfe85b8a1f6ff6c308e5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63F4 4712 bytes
font_01_sfnt_off000073c6.bin
45033baa2f42fc64c48ad0973ac20040e51061d1fe05d20a98ea01cd7b24e052		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73C6 10464 bytes
font_02_sfnt_off00009784.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9784 4324 bytes

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