Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa94609c91a6826c…

MALICIOUS

PDF

67.1 KB Created: 2020-08-10 12:04:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b8c8e6e4147cc17899945ffddc2fdfff SHA-1: b9a58a5a2f7245c9018d1378c6325c797244940b SHA-256: fa94609c91a6826cc3dbeeafeb3e70be039918db4658f4dad089c65598a2c25b
150 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link pointing to 'https://ttraff.com/pify?keyword=photosynthesis+in+bacteria+pdf'. This URL is likely used to redirect the user to a phishing or scam page. The document also contains a link farm heuristic, indicating a large number of external links, many of which point to benign Shopify URLs but one points to the malicious ttraff.com domain. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted from this sample.

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/pify?keyword=photosynthesis+in+bacteria+pdf
    • http://xobix.27andoak.com/uploads/1/3/1/3/131380429/jeburopijemado.pdf
    • http://files.risk-and-resilience.co.uk/uploads/1/3/1/6/131606864/862fe.pdf
    • http://files.keepinitreelchartersunlimited.com/uploads/1/3/2/6/132681028/576448.pdf
    • https://cdn.shopify.com/s/files/1/0436/3767/0041/files/96056927277.pdf
    • https://cdn.shopify.com/s/files/1/0433/8850/2174/files/92364507514.pdf
    • https://cdn.shopify.com/s/files/1/0437/2063/8632/files/sql_date_format_yyyymmdd.pdf
    • https://cdn.shopify.com/s/files/1/0431/3733/5464/files/7977806974.pdf
    • https://cdn.shopify.com/s/files/1/0427/4431/6070/files/25784995791.pdf
    • https://cdn.shopify.com/s/files/1/0430/5272/8474/files/js_camelcase_to_kebab_case.pdf
    • https://cdn.shopify.com/s/files/1/0432/2318/7616/files/wetherspoons_menu_2020.pdf
    • https://cdn.shopify.com/s/files/1/0446/0973/2771/files/functional_data_analysis_ramsay_download.pdf
    • https://cdn.shopify.com/s/files/1/0432/6057/5894/files/dulen.pdf
    • https://cdn.shopify.com/s/files/1/0432/7974/5192/files/mozewipugezol.pdf
    • https://cdn.shopify.com/s/files/1/0427/7351/2359/files/dunewalemolisorezofefeseb.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_off0000c93a.bin
f26e02e5e022a98e6b778e52f9730ebb3f9077d1e9dfe14d09dabd0bd3d603da		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC93A 5456 bytes
font_01_sfnt_off0000dbc1.bin
95ef187b4357f81192bc0346ae3ef8c1b358d486e62eabc788e47f12069c6085		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDBC1 10472 bytes

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