Malicious PDF — malware analysis report

Static analysis result for SHA-256 51999e0d35af0a2b…

MALICIOUS

PDF

46.6 KB Created: 2020-09-05 20:40:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 54f76624b4b2cc0b8f7b584f1ac9450b SHA-1: 6bcad5ef7eaa8a33631f24b36db777c6858e3453 SHA-256: 51999e0d35af0a2bdaad5ec4578c04f3b4fc16176f4101f0acba2fc0e8ce5377
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with a critical heuristic firing for PDF_SEO_LINK_FARM. One of these links, https://ttraff.link/wix?keyword=absolute+carnage+lethal+protectors, is flagged as a malicious redirector. The document body, though heavily obfuscated, contains references to this malicious URL and other benign-looking PDF links hosted on Shopify. The primary attack vector appears to be directing users to malicious infrastructure through a link farm.

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.link/wix?keyword=absolute+carnage+lethal+protectors
    • https://cdn.shopify.com/s/files/1/0432/9829/1870/files/kajufowefu.pdf
    • https://cdn.shopify.com/s/files/1/0432/1126/0062/files/83097257447.pdf
    • https://cdn.shopify.com/s/files/1/0429/7896/7703/files/dejumogej.pdf
    • https://cdn.shopify.com/s/files/1/0429/2263/9527/files/fazobipunelujujapejojet.pdf
    • https://cdn.shopify.com/s/files/1/0427/9320/5916/files/apple_bootcamp_drivers.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/46287179129.pdf
    • https://cdn.shopify.com/s/files/1/0428/9980/0217/files/jovonob.pdf
    • https://static.usrfiles.com/ugd/2f7815_71e2fb7ef9a34862b642ffc0414f1ad9.pdf
    • https://static.usrfiles.com/ugd/3cb6cb_f43c3785130040d0bc8f081fd274fbe5.pdf
    • https://cdn.shopify.com/s/files/1/0428/2214/0063/files/about_foundation.pdf
    • https://cdn.shopify.com/s/files/1/0434/1710/8642/files/mixozixukotubazaves.pdf
    • https://cdn.shopify.com/s/files/1/0435/4444/5092/files/13968753886.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006a2a.bin
c5aaf030bab462e6067754174caa22e6bc4bada5a99daf146005e722b218e809		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A2A 5156 bytes
font_01_sfnt_off00007ba3.bin
9a1a6ccd69692ac290ff4fc97fee2e77b6c097ffe886530264b4b80c19c27d9b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7BA3 10564 bytes
font_02_sfnt_off00009fb9.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9FB9 4324 bytes

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