Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6f191d5e3a4b623…

MALICIOUS

PDF

48.2 KB Created: 2020-08-03 22:10:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6bc9e39ec0b5401f4703956133a4e674 SHA-1: 4a57554513bfb817190e5c030a96861420c46468 SHA-256: f6f191d5e3a4b623996998b946bfe7b01e083b2f88ab2ec25f971d78600382d4
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, characteristic of a link farm designed to manipulate search engine rankings or redirect users to malicious sites. One of the primary URLs, 'https://ttraff.com/pify?keyword=berg+balance+scale+rehab+measures+pdf', is identified as a malicious redirector. The document body itself is heavily obfuscated but contains references to this redirector URL and numerous other Shopify-hosted PDF links, suggesting a coordinated effort to distribute potentially harmful 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=berg+balance+scale+rehab+measures+pdf
    • http://files.laurasprinkle.net/uploads/1/3/2/6/132682758/5422519.pdf
    • http://files.boxboardstheatre.com/uploads/1/3/1/3/131383478/2274803.pdf
    • http://files.bikewritingbuilder.com/uploads/1/3/0/8/130874067/5dd82b.pdf
    • http://files.umityalcinalp.com/uploads/1/3/1/6/131637701/ruvapanegagajuwiw.pdf
    • https://cdn.shopify.com/s/files/1/0435/9910/2110/files/41502356733.pdf
    • https://cdn.shopify.com/s/files/1/0427/4287/4278/files/somewhere_safe_with_somebody_good.pdf
    • https://cdn.shopify.com/s/files/1/0430/3791/7345/files/volepigirolon.pdf
    • https://cdn.shopify.com/s/files/1/0433/4249/5899/files/if_else_in_r.pdf
    • https://cdn.shopify.com/s/files/1/0434/0062/6325/files/14827652311.pdf
    • https://cdn.shopify.com/s/files/1/0437/4121/6919/files/65339239930.pdf
    • https://cdn.shopify.com/s/files/1/0430/4021/1105/files/vesudorikulirorujate.pdf
    • https://cdn.shopify.com/s/files/1/0433/3859/6511/files/96809769103.pdf
    • https://cdn.shopify.com/s/files/1/0429/3342/0195/files/41015473030.pdf
    • https://cdn.shopify.com/s/files/1/0431/3694/2234/files/lafuvibilavizut.pdf
    • https://cdn.shopify.com/s/files/1/0430/1458/6517/files/suteso.pdf
    • https://cdn.shopify.com/s/files/1/0433/2758/6472/files/71369182861.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_off00007ce3.bin
f4fe2ae14e16bc6d8a7214d9763fb8b2899b31b099314cf826f3ff2a2fc6bc3d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7CE3 5760 bytes
font_01_sfnt_off00009049.bin
ad4cfad54c041618127b70c50b1a4ea9ba69b1f22e72f008d1eaa99a5f4c64c3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9049 10404 bytes

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