Malicious PDF — malware analysis report

Static analysis result for SHA-256 d662ab7f9ad1b55a…

MALICIOUS

PDF

42.6 KB Created: 2020-09-07 08:43:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 81fc1533496f032de8d8689d39b69624 SHA-1: 4ad280bf974ed101dabc32fe5b09402488e07844 SHA-256: d662ab7f9ad1b55a67bc04cdbb5214f82c05127a1d76df29abf6c9770b0ddb0c
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, many of which point to Shopify domains, likely as part of an SEO link farm. One critical heuristic firing indicates a direct link to a known malicious redirector. The document body, though heavily obfuscated, contains the malicious redirector URL and appears to be a lure for users to click on the links.

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=c+and+m+performance+hubertus+wi
    • https://cdn.shopify.com/s/files/1/0437/0389/4171/files/bugexobovoviju.pdf
    • https://cdn.shopify.com/s/files/1/0463/0455/9261/files/tropical_garden_plants_by_bose.pdf
    • https://cdn.shopify.com/s/files/1/0433/9692/3543/files/bard_performance_ffxiv.pdf
    • https://static.usrfiles.com/ugd/8bc2a6_dc44c77c110d46bcace449c5d983acb6.pdf
    • https://static.usrfiles.com/ugd/374ce0_42b715539484459e88fe92f7e1a29a95.pdf
    • https://static.usrfiles.com/ugd/dad90e_0e21216a44d2410ca80560a1cba7ff10.pdf
    • https://static.usrfiles.com/ugd/ede58b_efd8ca8d004a41689d92e775e292d6cf.pdf
    • https://cdn.shopify.com/s/files/1/0439/8238/9406/files/38736942159.pdf
    • https://cdn.shopify.com/s/files/1/0440/2987/0230/files/64133397632.pdf
    • https://cdn.shopify.com/s/files/1/0431/6351/7092/files/lared.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/bolosenisom.pdf
    • https://static.usrfiles.com/ugd/c75f60_fef32a4b97d740ccbec1e557d5641d82.pdf
    • https://static.usrfiles.com/ugd/9058e5_aff969608a344e88b8df0e1a48cf5c0d.pdf
    • https://static.usrfiles.com/ugd/9b2d9b_9a389bb47c344f4bacb792d1583a8427.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_off00005a41.bin
565f5329593cc3e53827f9c5ca6091e79fb42501264300b6da0898aa5f196043		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A41 5500 bytes
font_01_sfnt_off00006cd2.bin
8c18bf46b533abebd97b7a182a34f058d436d0743252060a6a0942a690d73a0a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6CD2 10060 bytes
font_02_sfnt_off00008f52.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8F52 4324 bytes

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