Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1e767f442fe58bd…

MALICIOUS

PDF

41.9 KB Created: 2020-08-30 03:29:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 50622986449010af8aa21aa1c5e0bf8b SHA-1: b546fe5e31080d8cc5d903e6ea8b3e4464d38195 SHA-256: e1e767f442fe58bd72f79d67ca945024e462d44d50c08d09d2dde22c30898eb0
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of embedded links, a technique often used in SEO spam campaigns to drive traffic to malicious sites. One of the embedded links, 'https://ttraff.cc/wix?keyword=hernia+femoral+pdf', is identified as a malicious redirector. The document body, though heavily obfuscated, contains text related to 'Hernia femoral pdf', suggesting a lure to entice users to click the malicious link.

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=hernia+femoral+pdf
    • https://static.usrfiles.com/ugd/0047a4_70ffcb7ab2ca418d8e32704c684549ca.pdf
    • https://static.usrfiles.com/ugd/a59130_5b87cfec39ed4a4cb415b244a2bf11b2.pdf
    • https://static.usrfiles.com/ugd/b8c837_6488a0cfe728435b831603c2fb947484.pdf
    • https://cdn.shopify.com/s/files/1/0428/7243/8947/files/the_hills_download_mp3.pdf
    • https://cdn.shopify.com/s/files/1/0429/5108/2143/files/37713558436.pdf
    • https://cdn.shopify.com/s/files/1/0432/8561/0654/files/tuvejugonomobijo.pdf
    • https://cdn.shopify.com/s/files/1/0437/5881/3336/files/dujoxaguwul.pdf
    • https://cdn.shopify.com/s/files/1/0429/6740/0601/files/xojaxexinatadejej.pdf
    • https://cdn.shopify.com/s/files/1/0432/5415/3371/files/siklus_hidup_cacing_kremi.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_off00006869.bin
0eb34a5267632b951b6b8e3b970a8eaa43e91eb1bb774fa92a7642f6d071b1c1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6869 4968 bytes
font_01_sfnt_off00007935.bin
b296a9a54727f9eb0112054257ded202730a9c3227603e1edbc58d2928304a7f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7935 10076 bytes

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