Malicious PDF — malware analysis report

Static analysis result for SHA-256 46113e5eb428b94d…

MALICIOUS

PDF

42.4 KB Created: 2020-09-02 14:13:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7ff6af9aba53fb09152d6a45169de48a SHA-1: bf89c5352b5c83c560e370f9784bd14cb171bbbf SHA-256: 46113e5eb428b94dbdb4c461cce7fadfc90d5a58414f8050a10dffcce87abab9
120 Risk Score

Malware Insights

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

The PDF file contains embedded links, one of which points to a known malicious redirector. The document body, though heavily obfuscated, contains text related to 'Gastrocnemius muscle tear patient information' and the malicious URL. The presence of numerous external PDF links suggests a link farm or SEO poisoning tactic to drive traffic to malicious sites. No scripts were extracted, but the primary attack vector appears to be social engineering via a deceptive document.

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=gastrocnemius+muscle+tear+patient+information
    • https://static.usrfiles.com/ugd/d43733_3a26b9fe0b614785aefacd7f48720ce3.pdf
    • https://static.usrfiles.com/ugd/b8c837_def89ea1257645e09c74abcd83d51160.pdf
    • https://static.usrfiles.com/ugd/b8c837_a35a52cb868b4ccfbcf705065ad8575a.pdf
    • https://static.usrfiles.com/ugd/ab0441_6f9cb44557c5478f89e35ac51abab2b0.pdf
    • https://static.usrfiles.com/ugd/599f1c_10586759947d4631bc8014cdf50c2404.pdf
    • https://cdn.shopify.com/s/files/1/0435/2881/4741/files/36853211515.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kefemomorevogik.pdf
    • https://cdn.shopify.com/s/files/1/0432/7673/0533/files/rirodabobukeju.pdf
    • https://cdn.shopify.com/s/files/1/0432/3537/7307/files/rejamukuwopironelozerefoz.pdf
    • https://static.usrfiles.com/ugd/9ea91e_6ca2c69386ef4f468112b3ab5359cfca.pdf
    • https://static.usrfiles.com/ugd/4bdc6d_50acfbb58fd34c0a9fd0104c40bc1c63.pdf
    • https://static.usrfiles.com/ugd/3aca14_adb8ac375c2e4dc585468af209f4e5f0.pdf
    • https://static.usrfiles.com/ugd/b8c837_8b02eeaa05704768a4dc0be4137c9f2e.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_off0000697a.bin
78479fed5998bbd15b684c70e5bd542ac0f507cf2377d2b9d9786a61d217fe3a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x697A 5192 bytes
font_01_sfnt_off00007b13.bin
28b7afa09c46b10e057f75fa6cf07b3da82496a8abc8d25c6b8049cf0bab8b69		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B13 9780 bytes

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