Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5952151371ad90a…

MALICIOUS

PDF

44.6 KB Created: 2020-09-03 04:22:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 77756972c8f506aaf26fcecd3ec11a4a SHA-1: 23800d622d3ab4710cc125e3f688368b253fd7a0 SHA-256: f5952151371ad90a7c651d65cc753e2e4f0324df45b763469559656173dbeae1
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The PDF file contains a link that redirects to a known malicious URL, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though partially corrupted, contains text related to 'buy bedding sheets online' and the malicious URL, suggesting a lure to trick users into clicking. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs pointing to external resources.

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=buy+bedding+sheets+online
    • https://static.usrfiles.com/ugd/b8c837_c6c43a1de9d949f5ad10a1b366588b14.pdf
    • https://static.usrfiles.com/ugd/52b593_9c28cfbe02c64c96adcb29f88737256e.pdf
    • https://static.usrfiles.com/ugd/b8c837_e8f9b1f3727c49e0a214c508011206bd.pdf
    • https://static.usrfiles.com/ugd/451461_20a797495b1d4bf6b1ffc566e093f6fa.pdf
    • https://static.usrfiles.com/ugd/a98ecc_8facb7434d4f4c78bda9ed1df8efba17.pdf
    • https://static.usrfiles.com/ugd/07625c_d827ec1163674108a7763d5498c82731.pdf
    • https://cdn.shopify.com/s/files/1/0432/7515/7670/files/gemuv.pdf
    • https://cdn.shopify.com/s/files/1/0433/2060/6885/files/kupanafotuvozixuramizin.pdf
    • https://cdn.shopify.com/s/files/1/0427/9674/4871/files/91530856381.pdf
    • https://cdn.shopify.com/s/files/1/0434/7258/4861/files/savelomuwosuvarilawobe.pdf
    • https://cdn.shopify.com/s/files/1/0439/3612/0990/files/causes_of_unemployment_in_zimbabwe_since_2020.pdf
    • https://cdn.shopify.com/s/files/1/0434/0498/4483/files/88203669719.pdf
    • https://cdn.shopify.com/s/files/1/0432/4550/2626/files/2016_chevy_malibu_owners_manual.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_off000068f6.bin
33000cfea5e38155d6de6166384507ab1df85192774fce602a7aa8778f32b3ce		 pdf-font-stream PDF embedded font (sfnt) at offset 0x68F6 5072 bytes
font_01_sfnt_off00007a44.bin
a4c2b5745addd1eaf9b73e843020db1b09f068789571adb2eee22cd27c909060		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A44 13872 bytes

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