Malicious PDF — malware analysis report

Static analysis result for SHA-256 4bc25b617d79d4f4…

MALICIOUS

PDF

42.2 KB Created: 2020-08-30 12:57:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a9ec842d0561535396269b3d59790d1e SHA-1: 0a6b37ca9c0cbd0ee218f1c025b18dae1f291b30 SHA-256: 4bc25b617d79d4f442948f390ae835bce1ed121f0f3947ab2f47247c935f2a62
150 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with one critical heuristic identifying a malicious redirector. The primary malicious URL, https://ttraff.com/wix?keyword=understanding+public+policy+thomas+dye+pdf, is likely used to lure victims. The presence of a large number of other links, many hosted on Shopify, suggests a link farm strategy to obscure the final malicious destination or to improve SEO for malicious content.

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=understanding+public+policy+thomas+dye+pdf
    • https://cdn.shopify.com/s/files/1/0462/5625/9221/files/balapuvefaxir.pdf
    • https://cdn.shopify.com/s/files/1/0432/7217/5784/files/10000_days_to_years.pdf
    • https://cdn.shopify.com/s/files/1/0435/9526/8264/files/94725124061.pdf
    • https://cdn.shopify.com/s/files/1/0428/9154/2681/files/xekinowivizalulumujulu.pdf
    • https://static.usrfiles.com/ugd/b8c837_af9f47ef1d0647a697260afccf296c92.pdf
    • https://cdn.shopify.com/s/files/1/0437/7178/9470/files/winchester_model_120.pdf
    • https://cdn.shopify.com/s/files/1/0448/2659/1389/files/35069900077.pdf
    • https://cdn.shopify.com/s/files/1/0439/2147/3691/files/relative_clauses_exercises_3_eso.pdf
    • https://cdn.shopify.com/s/files/1/0434/3663/8369/files/five_ten_guide_tennie_approach.pdf
    • https://cdn.shopify.com/s/files/1/0433/1818/2041/files/arabic_numbers_1_to_20.pdf
    • https://cdn.shopify.com/s/files/1/0434/0632/7959/files/manajemen_sumber_daya_manusia_pendidikan.pdf
    • https://cdn.shopify.com/s/files/1/0440/8950/7990/files/inheritance_book_3.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_off00005950.bin
211c8ab520cf368d4e79f50570bfec5241933c6cd56c755b0a9a85f43272a9f2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5950 5684 bytes
font_01_sfnt_off00006c6c.bin
5eb5a23f80cb8b51b8baeb0aa7e47a1c959b0a1fcf9cee9d43a7b108732d93f9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C6C 9724 bytes
font_02_sfnt_off00008da4.bin
7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8DA4 4324 bytes

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