Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2a3d1d03ca860e3…

MALICIOUS

PDF

34.6 KB Created: 2020-09-02 08:48:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ff78ba7392e5dbddb6e8ffbd70a9c00a SHA-1: 85c26492de91614c896b0c55ac8b3da7ae64bb5e SHA-256: e2a3d1d03ca860e36d507c0e22173658113a08d07a76ae43d118f3cb92eadbc0
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK, indicating it points to malicious infrastructure. The document body and embedded URLs suggest a lure related to "Utorrent remote android help". The primary malicious IOC is the redirector URL, which is likely used to deliver a secondary payload. The PDF also contains a large number of embedded links, many pointing to Shopify, which is characteristic of SEO link farm techniques.

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.me/wix?keyword=utorrent+remote+android+help
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/32878299647.pdf
    • https://cdn.shopify.com/s/files/1/0432/2207/3506/files/597451135.pdf
    • https://cdn.shopify.com/s/files/1/0438/8211/9323/files/canadian_immigration_visa_application_form_pdf.pdf
    • https://cdn.shopify.com/s/files/1/0446/9896/0026/files/create_fillable_form_without_acrobat.pdf
    • https://cdn.shopify.com/s/files/1/0428/7794/3967/files/3750107861.pdf
    • https://static.usrfiles.com/ugd/c34aa9_4ceaabcd9e6840f9a2ab3731f59c816d.pdf
    • https://cdn.shopify.com/s/files/1/0434/4751/7350/files/fabigaxawobajaxaweg.pdf
    • https://cdn.shopify.com/s/files/1/0438/0822/7490/files/facebook_marketplace_not_loading_on_android.pdf
    • https://static.usrfiles.com/ugd/e3ed1f_86520c686ff5442d8c9d666e1bb33c1e.pdf
    • https://static.usrfiles.com/ugd/50de67_282fe27a3a614a37bfbd7598f1892144.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_off00004b26.bin
c9ab270b92f0f5b08147240798a42827ee7fe72865c323f412285ca2edd111f2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4B26 5012 bytes
font_01_sfnt_off00005c00.bin
c415ed3b6366cef0f3e57a8569a3d5929e95ea4e5df77ff72d328572db3a75a3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C00 9948 bytes

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