Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8cc53c9a8b7613f…

MALICIOUS

PDF

37.8 KB Created: 2020-09-01 17:46:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8539cb6865b606768480ca1671dc28a0 SHA-1: 7a1acc3e8dfb0bfcffcf31a122272d448b4e40d3 SHA-256: a8cc53c9a8b7613f78d54d9a9fd0e6989f9f356928ca28cc1a8659d5170aa47a
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.com/wix?keyword=ikea+bed+sheets+canada'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs, many pointing to 'static.usrfiles.com'. The document body, though heavily obfuscated, contains a reference to the same malicious URL, reinforcing the intent to redirect the user. The primary attack pattern involves luring the user to a malicious site via a deceptive link within the PDF.

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=ikea+bed+sheets+canada
    • https://static.usrfiles.com/ugd/b8c837_46727d6a9e3a44e880657e6f3428764c.pdf
    • https://static.usrfiles.com/ugd/18f527_3d4cca351b6841388bdd841a2c03e64a.pdf
    • https://static.usrfiles.com/ugd/b8c837_b41ed9564edc49e481e31d1d9dac9b30.pdf
    • https://cdn.shopify.com/s/files/1/0435/7616/4515/files/kind_reminder_email_template.pdf
    • https://cdn.shopify.com/s/files/1/0440/7004/3813/files/the_maze_runner_the_fever_code_summary.pdf
    • https://cdn.shopify.com/s/files/1/0435/2478/4283/files/81199184365.pdf
    • https://cdn.shopify.com/s/files/1/0428/6509/8918/files/type_effectiveness_calculator.pdf
    • https://cdn.shopify.com/s/files/1/0432/7571/4715/files/the_used_the_taste_of_ink.pdf
    • https://static.usrfiles.com/ugd/07625c_ca64e8c9776344418f247a86cf45c7c1.pdf
    • https://static.usrfiles.com/ugd/68ec51_d74df495639440a09d65004c11d4d27c.pdf
    • https://static.usrfiles.com/ugd/345929_85e1aa9cf58c4a13923ae0cd9a0f1127.pdf
    • https://static.usrfiles.com/ugd/1be480_d7316ce1d32947b2bf7f69dc9894b256.pdf
    • https://static.usrfiles.com/ugd/3e87bf_0fc9aab280734c9e8a1468211ab2e916.pdf
    • https://static.usrfiles.com/ugd/bfbc46_e764ea9c1b3e4334811f83246109077e.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_off0000579d.bin
a8a3c67422394382992f8fa2bfc5146919e3040acf88eabcbf70e12a938a9dda		 pdf-font-stream PDF embedded font (sfnt) at offset 0x579D 5040 bytes
font_01_sfnt_off000068c1.bin
9a49e9f0b316f7177bfdd1dc386cf9fff3ccb67353bda70445038759ee7c5b89		 pdf-font-stream PDF embedded font (sfnt) at offset 0x68C1 10084 bytes

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