Malicious PDF — malware analysis report

Static analysis result for SHA-256 2656ceac0f1b17c4…

MALICIOUS

PDF

46.0 KB Created: 2020-08-31 01:06:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5b946f982aafdf5f77dcbf40ca378c70 SHA-1: c29a14da5407e70d45db614e0b2e4d7a23542e13 SHA-256: 2656ceac0f1b17c45eda88552500ee29229fe26c9ff2f024f466389f60bf64b8
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 link farm. One of these links, https://ttraff.com/wix?keyword=aws+certified+solutions+architect+official+study+guide+pdf+download, is flagged as a malicious redirector. The document body, though heavily obfuscated, appears to be a lure related to a study guide, suggesting a social engineering tactic to entice users to click the malicious 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.com/wix?keyword=aws+certified+solutions+architect+official+study+guide+pdf+download
    • https://cdn.shopify.com/s/files/1/0432/6971/8182/files/ipl_2020_schedule_time_table.pdf
    • https://cdn.shopify.com/s/files/1/0440/6099/9830/files/15191573921.pdf
    • https://cdn.shopify.com/s/files/1/0429/0831/9903/files/6_characteristics_of_a_project.pdf
    • https://cdn.shopify.com/s/files/1/0446/6599/5417/files/minolta_maxxum_7000_manual.pdf
    • https://cdn.shopify.com/s/files/1/0434/5780/6486/files/nctb_books_of_class_11_12_biology.pdf
    • https://cdn.shopify.com/s/files/1/0428/8489/0790/files/63400428619.pdf
    • https://cdn.shopify.com/s/files/1/0433/8227/6250/files/28861423112.pdf
    • https://static.usrfiles.com/ugd/b8c837_e7e0b3ce968343c2bab98d79d3275bbd.pdf
    • https://static.usrfiles.com/ugd/cc14e4_afeb21486626405f861ae959e4489128.pdf
    • https://static.usrfiles.com/ugd/b8c837_69fe03376c6847e08045daf54c459169.pdf
    • https://static.usrfiles.com/ugd/b8c837_6cf9a6261fb5429da0ff630d38187111.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_off00006b92.bin
6e00e05bec9ec4e1f0dbb60057157dace04aa1e2277e4cbc27b2797c44b10170		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B92 5600 bytes
font_01_sfnt_off00007eaa.bin
fd63b4d5cc0f478881e8cfadd5147be9ef29a616c788e713857334310a6a3db4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7EAA 14212 bytes

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