Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b7ee1e167a976eb…

MALICIOUS

PDF

43.1 KB Created: 2020-08-31 17:14:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 97920ca512b9209f22cc5ebbb3890b29 SHA-1: 14c2fbf2189291280b864afbd7d5d38679579c67 SHA-256: 2b7ee1e167a976eb44517a25d52611e99b9e5d0f0257e43365179fcedb25f7c4
150 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing indicating it links to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text related to 'natural gas inventory report estimates' and the malicious URL. The presence of a large number of external PDF links, many hosted on Shopify, suggests a link farm or SEO poisoning tactic to obscure the true malicious destination.

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=natural+gas+inventory+report+estimates
    • https://cdn.shopify.com/s/files/1/0435/5116/2523/files/boney_m_feliz_navidad_music.pdf
    • https://cdn.shopify.com/s/files/1/0434/1045/6726/files/20560629963.pdf
    • https://cdn.shopify.com/s/files/1/0445/5759/8884/files/43660288632.pdf
    • https://cdn.shopify.com/s/files/1/0434/9345/8070/files/18253994203.pdf
    • https://cdn.shopify.com/s/files/1/0441/3086/1208/files/22874933297.pdf
    • https://cdn.shopify.com/s/files/1/0428/4848/5535/files/mf_165_parts.pdf
    • https://cdn.shopify.com/s/files/1/0434/4758/2870/files/armnicas_en_sistemas_elctricos_industriales.pdf
    • https://cdn.shopify.com/s/files/1/0431/2032/8853/files/clasificacion_de_empresa_segun_su_tamao.pdf
    • https://static.usrfiles.com/ugd/b8c837_6058219135d1484896c822688aac2bcc.pdf
    • https://static.usrfiles.com/ugd/12745a_0be60f92792b4a578d2fea923ea515e2.pdf
    • https://static.usrfiles.com/ugd/b8c837_407c605c881c44f1a4d6a1741ebced12.pdf
    • https://static.usrfiles.com/ugd/5b9a87_77930fc83f174c61bd9be18d43f0c00d.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_off00006062.bin
fce82f9a38e26cf0c4c6fed9a6c121589e4b22ac8e5096f25538bbecbf52703e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6062 5268 bytes
font_01_sfnt_off00007253.bin
87bb40dbf1af636faa2aca8b5aaf7d81403284a38dc398adb6ecaaec3b224173		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7253 14796 bytes

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