Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7e7c887178906a2…

MALICIOUS

PDF

122.5 KB Created: 2020-08-29 06:49:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a6eb3b69e1a93db3ecde23a24602fb4e SHA-1: 489995b7bea53273b6200b0eb6dea0d192e9a38f SHA-256: b7e7c887178906a2ad5788224a3c8843d3074504848932a3bd1985fd3bf11771
158 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1566.002 Spearphishing Attachment T1071.001 Web Protocols

The PDF contains embedded JavaScript and links to known malicious redirector infrastructure. The primary malicious URL identified is https://ttraff.cc/wix?keyword=tuesdays+with+morrie+aphorism. The document also exhibits characteristics of a link farm, with numerous external PDF links, suggesting an attempt to manipulate search engine results or distribute further malicious content. The ML classifier strongly supports the malicious verdict.

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/wix?keyword=tuesdays+with+morrie+aphorism
    • https://cdn.shopify.com/s/files/1/0436/0480/3746/files/73605692923.pdf
    • https://cdn.shopify.com/s/files/1/0434/7900/7398/files/nimuxu.pdf
    • https://cdn.shopify.com/s/files/1/0429/0261/8278/files/barisan_dan_deret_geometri.pdf
    • https://cdn.shopify.com/s/files/1/0436/2141/7122/files/94163360641.pdf
    • https://cdn.shopify.com/s/files/1/0431/1423/4017/files/sanofugo.pdf
    • https://cdn.shopify.com/s/files/1/0431/2095/1445/files/xopogopebu.pdf
    • https://cdn.shopify.com/s/files/1/0463/0809/8205/files/drawing_cumulative_frequency_graphs_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0431/8307/9592/files/74757461947.pdf
    • https://static.usrfiles.com/ugd/b8c837_d22fd146ee264c92974c63edcf25287d.pdf
    • https://static.usrfiles.com/ugd/b8c837_a6c34eea607d423bbeb400693806f6c4.pdf
    • https://static.usrfiles.com/ugd/b8c837_2acec33f7acb4f4499c67516a0ffd7c8.pdf
    • https://cdn.shopify.com/s/files/1/0434/7569/7830/files/comprendre_le_cercle_trigonomtrique.pdf
    • https://cdn.shopify.com/s/files/1/0432/7315/8821/files/46287728478.pdf
    • https://cdn.shopify.com/s/files/1/0430/7465/0261/files/rs3_magic_guide.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00017da9.bin
fe47cd777f1187c7df70b785e7e326a37ebb6dafe0bccdb5290c57d695edd117
pdf-font-stream PDF embedded font (sfnt) at offset 0x17DA9 5308 bytes
font_01_sfnt_off00018fa3.bin
7bb0705c76d6d302bc68d0b4203ad321328728265c9242ec570d3af4c29d38cb
pdf-font-stream PDF embedded font (sfnt) at offset 0x18FA3 10372 bytes
font_02_sfnt_off0001b355.bin
415b7e6d6a3715caa5c16daf339977a8fc01f4941996a93f3186cfc93dc227f9
pdf-font-stream PDF embedded font (sfnt) at offset 0x1B355 23588 bytes