Malicious PDF — malware analysis report

Static analysis result for SHA-256 fecd86b8bcccdfe6…

MALICIOUS

PDF

40.5 KB Created: 2020-08-31 15:42:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a8b4756967ae0b0bc17a8efe64a338d3 SHA-1: 2250210806bc734b3728670abb6207ea20007a80 SHA-256: fecd86b8bcccdfe6116ed25ae188ea91fad4b3263a4e9b54d560faa1dce834ce
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 Malicious Link T1059.001 PowerShell

The PDF contains a mass external link farm, with the primary malicious URL being https://ttraff.com/wix?keyword=sql+server+report+builder+if+null. This URL is flagged as a malicious redirector. The document body, though heavily obfuscated, also contains this URL, suggesting the intent is to trick the user into clicking it by mimicking a search result. No scripts were extracted, limiting further analysis of the payload.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=sql+server+report+builder+if+null
    • https://cdn.shopify.com/s/files/1/0432/5729/9099/files/sazosukodosavawolafimisag.pdf
    • https://cdn.shopify.com/s/files/1/0437/6992/1688/files/paper_folded_fortune_teller_template.pdf
    • https://cdn.shopify.com/s/files/1/0429/4751/0435/files/hungry_dragon_guide.pdf
    • https://static.usrfiles.com/ugd/19ce5d_a78233414a134a8192cc3732a62f902e.pdf
    • https://static.usrfiles.com/ugd/b85eb0_111e38d03017417ca827a5c1149d4e7d.pdf
    • https://static.usrfiles.com/ugd/b8c837_ebe5f5248af946c5b1cf4e1835eef8ce.pdf
    • https://static.usrfiles.com/ugd/e3c460_800ebced25854519aec423a2ee148ccb.pdf
    • https://static.usrfiles.com/ugd/b47706_0384cdadef92451c84a632b074581631.pdf
    • https://cdn.shopify.com/s/files/1/0428/0962/2687/files/mexalopavewuxutuzem.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/gamusuzojikifikukudubug.pdf
    • https://cdn.shopify.com/s/files/1/0435/3500/7893/files/49586349856.pdf
    • https://cdn.shopify.com/s/files/1/0440/8328/2070/files/meaning_of_political_party.pdf
    • https://cdn.shopify.com/s/files/1/0431/7606/7228/files/battleship_template_excel.pdf
    • https://cdn.shopify.com/s/files/1/0437/2211/3173/files/que_son_informantes_claves_segun_autores.pdf
    • https://cdn.shopify.com/s/files/1/0435/6443/3569/files/stages_of_embryonic_development_of_the_zebrafish.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_off000058af.bin
df8bafb9dcede3bc97b17585c39ca369ee8924d9bf96d7e86d90dc4169175af9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x58AF 5252 bytes
font_01_sfnt_off00006a9e.bin
2b50cdc6b4949eb4eab4e74a65f19dc22e193a3f2dcf7ffaaf3af4a63ec854b5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A9E 13448 bytes

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