Malicious PDF — malware analysis report

Static analysis result for SHA-256 eeaa694c37ac906b…

MALICIOUS

PDF

53.6 KB Created: 2020-08-23 05:08:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b9dd0c045f8fe58a252ec27acfc7274c SHA-1: 8fde82562aa280dc0f746f67b9019b9fb9b0722b SHA-256: eeaa694c37ac906be154df5d00f2e63993e1089550fd4e17f27122f883c32289
158 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript and multiple external links, with one specifically identified as a malicious redirector. The document body, though heavily obfuscated, contains the string 'Formal letter format cbse 2019' and the malicious URL 'https://ttraff.cc/pify?keyword=formal+letter+format+cbse+2019', suggesting a lure to a malicious site. The presence of numerous links, including a link farm, further indicates malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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 JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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/pify?keyword=formal+letter+format+cbse+2019
    • http://files.cleaningsantabarbara.com/uploads/1/3/0/7/130739693/tosugaxadaze.pdf
    • http://puwetaju.newavenuescounseling.com/uploads/1/3/2/7/132710621/gupelodavanezinumul.pdf
    • https://cdn.shopify.com/s/files/1/0431/0184/7708/files/81171098256.pdf
    • https://cdn.shopify.com/s/files/1/0431/1007/2481/files/analysis_of_financial_statements_ts_grewal.pdf
    • https://cdn.shopify.com/s/files/1/0430/6462/3265/files/38526300944.pdf
    • https://cdn.shopify.com/s/files/1/0431/2930/7296/files/relationship_between_social_science_and_applied_social_science.pdf
    • https://cdn.shopify.com/s/files/1/0431/3304/2839/files/assignment_abroad_times_epaper_today_2020.pdf
    • https://cdn.shopify.com/s/files/1/0433/1444/6489/files/wirojirudegid.pdf
    • https://cdn.shopify.com/s/files/1/0440/4881/0149/files/fusomoxiporigunometiwo.pdf
    • https://cdn.shopify.com/s/files/1/0432/7643/5612/files/75718385625.pdf
    • https://cdn.shopify.com/s/files/1/0439/6243/3694/files/ecological_relationships.pdf
    • https://cdn.shopify.com/s/files/1/0430/9906/2421/files/dovevosenawajezutogelon.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_off000092d7.bin
d8c0a742870ef688ec6a985b2ea6c75ea7dbc11108873b366e0ef40100735bda		 pdf-font-stream PDF embedded font (sfnt) at offset 0x92D7 5604 bytes
font_01_sfnt_off0000a5cd.bin
59a319348042102747a7632ba5d140116422bfd76b4cf4cc15e7b8653a8b0a2b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA5CD 10540 bytes

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