Malicious PDF — malware analysis report

Static analysis result for SHA-256 34a565594a458e5d…

MALICIOUS

PDF

38.1 KB Created: 2020-08-30 04:12:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4dc30f5bb0a79a957033075e1134e62c SHA-1: 3eb853d8469fce0a8f151f175f72861f8757970b SHA-256: 34a565594a458e5dc08111738dbd87a35e740fad0ebd4289358c0c6e8b3e754d
120 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, identified as a PDF link farm. One of these links, 'https://ttraff.ru/wix?keyword=see%252527+s+candy+box+guide', points to known malicious redirector infrastructure. The document body, though partially corrupted, contains text related to a 'candy box guide' and mentions wkhtmltopdf, suggesting a lure to disguise the malicious linking activity. The primary attack pattern involves leveraging these links for malicious purposes, potentially SEO manipulation or user redirection.

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.ru/wix?keyword=see%252527+s+candy+box+guide
    • https://static.usrfiles.com/ugd/b8c837_490aa790dd5a4d7a8d9506a8d4864a6d.pdf
    • https://static.usrfiles.com/ugd/136d07_91641abe31f34b579a61df9677ca7f49.pdf
    • https://static.usrfiles.com/ugd/271e65_3e78fcaabd514f27b639f075528eb059.pdf
    • https://cdn.shopify.com/s/files/1/0429/1965/7628/files/pidos.pdf
    • https://static.usrfiles.com/ugd/b8c837_71eaf389f3d94dfd8354dcb8484d49b1.pdf
    • https://static.usrfiles.com/ugd/b8c837_220ade6815ed48b7aa4d76abad028ef4.pdf
    • https://static.usrfiles.com/ugd/b8c837_df04a3c7bfc34e81a87a5fd656363619.pdf
    • https://static.usrfiles.com/ugd/b8c837_5ad9b255d5cf4ba5b5ac3a68487226bd.pdf
    • https://static.usrfiles.com/ugd/599f1c_6779d5ff3daf440a8066e09a1d4689a9.pdf
    • https://static.usrfiles.com/ugd/0c41e7_a120955a244646598d19cc21b4e7c484.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_off00004e4d.bin
28cc4005190aa3b86a140ec54552689a3b1f4e8c4622a7e4d2a9154ad9de820a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4E4D 5424 bytes
font_01_sfnt_off000060e4.bin
0ec5e418df9e92102676007756b7cbeb0e82ecbea47e1af86e57b89121497375		 pdf-font-stream PDF embedded font (sfnt) at offset 0x60E4 13452 bytes

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