Malicious PDF — malware analysis report

Static analysis result for SHA-256 b6bb5d2d8510ab3a…

MALICIOUS

PDF

35.0 KB Created: 2020-09-01 12:53:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8b59854b447128d23aa8b205a0646cbb SHA-1: c3b6fb7a147fb14ae65cefba5d1393155154560c SHA-256: b6bb5d2d8510ab3a815c4201e8350b73a4422103311394cf00de887cb2ace94f
120 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, specifically 'https://ttraff.cc/wix?keyword=antech+online+forms'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs pointing to external resources. The document body, though heavily obfuscated, contains the same redirector URL, reinforcing its malicious intent. The primary goal appears to be directing users to malicious 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.cc/wix?keyword=antech+online+forms
    • https://static.usrfiles.com/ugd/8a419d_8ed9f516dfeb48acb6ceb4f8e8097b57.pdf
    • https://static.usrfiles.com/ugd/be19e1_11e0def980074d22bc44328f2dc1a838.pdf
    • https://static.usrfiles.com/ugd/77941b_8c2b5feee80c4a75a7fd5b1d148a807f.pdf
    • https://static.usrfiles.com/ugd/09273f_dc5d133ef39d47488d23b9e9b5d2b6d8.pdf
    • https://static.usrfiles.com/ugd/0df15e_5a69625454ba498289e1de73a9d39ab4.pdf
    • https://cdn.shopify.com/s/files/1/0439/9231/8110/files/avs_audio_editor_mac_free.pdf
    • https://cdn.shopify.com/s/files/1/0434/3067/4597/files/tinuwewa.pdf
    • https://cdn.shopify.com/s/files/1/0459/8815/1458/files/media_player_apple_free.pdf
    • https://cdn.shopify.com/s/files/1/0430/9889/8592/files/wizubulimoj.pdf
    • https://cdn.shopify.com/s/files/1/0429/4007/2102/files/lavamaliworu.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_off000044e0.bin
8066c162b8b01661842ce3908032e723f903b88a725c885a9728603b72e6d358		 pdf-font-stream PDF embedded font (sfnt) at offset 0x44E0 4900 bytes
font_01_sfnt_off00005566.bin
94d79f0386cd82d73316aa28ad4d4495ce52bd9522fa9eee8c32c0889e2e6354		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5566 13376 bytes

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