Malicious PDF — malware analysis report

Static analysis result for SHA-256 fcc63533fd7458a7…

MALICIOUS

PDF

44.1 KB Created: 2020-08-30 00:23:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 772532decf19a3f13eed8da718aae2bc SHA-1: 308f70e518c1dd27ca9a3546e85bdd11dab2feef SHA-256: fcc63533fd7458a723cd53c82665c03b1e37edb69e3fe3e3cc4cef9889f02858
120 Risk Score

Malware Insights

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

The PDF file contains a lure related to a 'retirement resignation acceptance letter' and embeds a link to a known malicious redirector. The PDF also contains a link farm pointing to multiple PDFs hosted on Shopify and static.usrfiles.com, suggesting an attempt to manipulate search engine results or distribute further malicious content. The primary malicious URL identified is ttraff.ru.

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=retirement+resignation+acceptance+letter
    • https://cdn.shopify.com/s/files/1/0440/8963/9077/files/39209289111.pdf
    • https://cdn.shopify.com/s/files/1/0434/3404/9703/files/86386032042.pdf
    • https://cdn.shopify.com/s/files/1/0433/8978/0124/files/67744379871.pdf
    • https://cdn.shopify.com/s/files/1/0435/1921/3727/files/393679400.pdf
    • https://static.usrfiles.com/ugd/b8c837_0101ef8a9c1742d981a7ea29c01fd187.pdf
    • https://static.usrfiles.com/ugd/b8c837_07d133cd68a94983bde22cdd42526000.pdf
    • https://static.usrfiles.com/ugd/b8c837_d51f0409b5254051a863753429337874.pdf
    • https://static.usrfiles.com/ugd/7f46b5_00e7ce114eab4ec4b09bbba6b2a8fb14.pdf
    • https://static.usrfiles.com/ugd/912de2_304e6e7dc5c84154ab3c1c65815e865e.pdf
    • https://static.usrfiles.com/ugd/b8c837_9ab8d2e2da394f6191214d53b1402e32.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_off00006c02.bin
837221b34b2ab3f7132ef7b70afa50cd2c78124aa64c8f1ea71477b52dfc7ba0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C02 5260 bytes
font_01_sfnt_off00007dcd.bin
91b1092b9d285b9336b42b3fcde96a1826d4035bf236f36f3046e42eb710815c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7DCD 11448 bytes

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