Malicious PDF — malware analysis report

Static analysis result for SHA-256 3da823702c520b3c…

MALICIOUS

PDF

42.1 KB Created: 2020-08-30 06:42:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 61a7231ba73d6a1e7fd912117806df7b SHA-1: 1101aa537662f54aa41a7548de05e81ecfd5fd29 SHA-256: 3da823702c520b3cd5d68513ebea449e77732a632ceac16933bc5be195c0ade9
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 pointing to Shopify-hosted PDFs, which is indicative of a link farm. One critical heuristic identified a link to a known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the redirector URL and several other Shopify URLs, suggesting a social engineering attempt to lure users to potentially malicious content.

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.cc/wix?keyword=noun+clause+that+functions+as+object
    • https://cdn.shopify.com/s/files/1/0437/4629/5959/files/enable_stereo_mix_windows_10.pdf
    • https://cdn.shopify.com/s/files/1/0432/0011/8943/files/supply_chain_finance_and_blockchain_technology.pdf
    • https://cdn.shopify.com/s/files/1/0434/6318/0438/files/cisco_9300_datasheet_firepower.pdf
    • https://cdn.shopify.com/s/files/1/0436/1512/5662/files/snow_leopard_iatkos_s3_v2.pdf
    • https://static.usrfiles.com/ugd/26938b_b12cc0b9177147c8a33a0b63840fe4c3.pdf
    • https://static.usrfiles.com/ugd/b8c837_2832e418af6d455aae9d5866b4f4d745.pdf
    • https://static.usrfiles.com/ugd/b8c837_82ebb2b9cc4f49bcb732a2ef894610f3.pdf
    • https://static.usrfiles.com/ugd/b8c837_3c18c599f1804bd293cf5e7b71338cb3.pdf
    • https://static.usrfiles.com/ugd/b8c837_377eb5b8a1364edd89a3078e171b4596.pdf
    • https://cdn.shopify.com/s/files/1/0432/6293/5200/files/47230353598.pdf
    • https://cdn.shopify.com/s/files/1/0428/0870/5187/files/zisaz.pdf
    • https://cdn.shopify.com/s/files/1/0429/1765/8780/files/the_history_of_thailand.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_off000068c4.bin
d801fa5ef920ab5a184de80e1c43955887c186e839e8d261f591c7f6ef089b75		 pdf-font-stream PDF embedded font (sfnt) at offset 0x68C4 5060 bytes
font_01_sfnt_off000079fc.bin
4e3255fa28b2412c2ae653071dc26fe811e10722de8dc47619633e40f45ab182		 pdf-font-stream PDF embedded font (sfnt) at offset 0x79FC 9968 bytes

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