Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb03db22676f82d9…

MALICIOUS

PDF

45.0 KB Created: 2020-09-01 04:40:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 65b8b03da1d6bb0362ddc2e4f08cc463 SHA-1: 0fd888ee9b560959d7e9205da57ddf9a395a8fed SHA-256: bb03db22676f82d92e0ab437014867f429eb80ce5e32f63e02d865eaaf857ea5
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link pointing to 'https://ttraff.ru/wix?keyword=best+free+auto+call+recorder+for+android'. It also contains a PDF link farm heuristic, indicating a large number of outbound links. The document body, though heavily obfuscated, contains the same URL and references to a 'free auto call recorder for android', suggesting a social engineering lure. The file is classified as malicious due to the presence of these links to potentially harmful infrastructure.

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=best+free+auto+call+recorder+for+android
    • https://cdn.shopify.com/s/files/1/0430/8713/4882/files/viropixujarizibukeguvujub.pdf
    • https://cdn.shopify.com/s/files/1/0429/6769/5509/files/nakikiforirupabove.pdf
    • https://cdn.shopify.com/s/files/1/0432/4248/7963/files/94830362127.pdf
    • https://static.usrfiles.com/ugd/b8c837_931200a67fff4940b176ef1a7a5e02f0.pdf
    • https://static.usrfiles.com/ugd/b8c837_74e3707b6826426d9c56d050c3e0849f.pdf
    • https://static.usrfiles.com/ugd/07625c_32e106a8b83c4b389195bee0b8f13056.pdf
    • https://static.usrfiles.com/ugd/b8c837_73dfdb07c00641189e673e1cfdbd9d78.pdf
    • https://static.usrfiles.com/ugd/87fdc7_a68a09c812d4499da0307a8804335b6c.pdf
    • https://static.usrfiles.com/ugd/b8c837_38b229dc1e31431aaf3ada771b33d3cc.pdf
    • https://static.usrfiles.com/ugd/345929_6f934eae1fdc49e3ad8bb77bcdd32aa1.pdf
    • https://static.usrfiles.com/ugd/d775a9_e2fca944c5ad48938bd98e2df78b367b.pdf
    • https://static.usrfiles.com/ugd/a382ee_7feef241883d48b99973f4fbb5fe4e21.pdf
    • https://static.usrfiles.com/ugd/d162e3_327a566d97484e6b9189a8aed2823517.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_off000063fb.bin
a2534d176a9fa3a8caefb8fda83e278442ae61cd879853d40a7547fd5d48912e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63FB 4948 bytes
font_01_sfnt_off000074d5.bin
3ba0da1aad2bb3a79223cbbfa1bf0f7efb2056a646451e218a124bd1f6620653		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74D5 10424 bytes
font_02_sfnt_off00009860.bin
ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9860 4324 bytes

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