Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9f90af1b045612c…

MALICIOUS

PDF

42.4 KB Created: 2020-08-08 15:39:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 433235ebe2a60399965a16744e5b233b SHA-1: 806c867ea3a5990b9c0764f406277ebdc9e67449 SHA-256: d9f90af1b045612c0d6abb3d23c8871eeea19b178195672a144b38adcccee1c0
120 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with a critical heuristic identifying a malicious redirector link to 'ttraff.com'. The document body, though heavily obfuscated, contains the same redirector URL and several benign-looking PDF links hosted on Shopify and other domains. This suggests a lure to a malicious site, likely for phishing or to download further malicious content.

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/pify?keyword=boundaries+worksheet+pdf
    • http://files.grousemesaoutfitters.com/uploads/1/3/1/3/131380889/9621249.pdf
    • http://files.whitepeacockcoffee.com/uploads/1/3/1/4/131436971/7dad80.pdf
    • http://files.jkhorse.com/uploads/1/3/1/6/131636954/kepekevexaf-supijemekote.pdf
    • http://files.brucedouglasreevesauthor.com/uploads/1/3/0/8/130874015/6367530.pdf
    • https://cdn.shopify.com/s/files/1/0432/6345/9486/files/17308987039.pdf
    • https://cdn.shopify.com/s/files/1/0431/0754/9338/files/pdfill_editor_registration_code.pdf
    • https://cdn.shopify.com/s/files/1/0437/5917/3784/files/financial_risk_management_tools.pdf
    • https://cdn.shopify.com/s/files/1/0433/6749/7884/files/lagixekisokavivupulisiv.pdf
    • https://cdn.shopify.com/s/files/1/0432/7473/1685/files/macromedia_flash_players_download.pdf
    • https://cdn.shopify.com/s/files/1/0437/9725/0205/files/70946068073.pdf
    • https://cdn.shopify.com/s/files/1/0433/7405/1493/files/ginefomofiwer.pdf
    • https://cdn.shopify.com/s/files/1/0431/6410/6901/files/87184923503.pdf
    • https://cdn.shopify.com/s/files/1/0440/0067/3950/files/marmoset_toolbag_3.pdf
    • https://cdn.shopify.com/s/files/1/0432/2803/7287/files/20059203521.pdf
    • https://cdn.shopify.com/s/files/1/0433/2758/6472/files/dadarubojebewexuj.pdf
    • https://cdn.shopify.com/s/files/1/0433/3741/6869/files/gulefukuturitufuwip.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_off000066f8.bin
a0a88d5e724942e572a59f6f2d99d88d899245409343d74c4d186e77b6e7dc79		 pdf-font-stream PDF embedded font (sfnt) at offset 0x66F8 5300 bytes
font_01_sfnt_off00007912.bin
308d4946768c261cff9e6505034dcb4915485ecff81161957c7ac378c905be8f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7912 10608 bytes

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