Malicious PDF — malware analysis report

Static analysis result for SHA-256 97fe59bde44f7eea…

MALICIOUS

PDF

36.1 KB Created: 2020-08-12 22:08:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c2b2a0512687fccb0f001707cc09e850 SHA-1: 731ddff39689e4a8069b0605846bee30dff5ceeb SHA-256: 97fe59bde44f7eea13c992b781e02a6b2fc833f7e763b3130363689ca85b6ea2
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to domains associated with link farms and redirectors. The primary malicious link, https://ttraff.ru/wb?keyword=author's%20purpose%20worksheet%204%20answer%20key, is designed to lure users into clicking by appearing as an educational resource. This link leads to known malicious redirector infrastructure, indicating a likely phishing or malware distribution attempt. No scripts were extracted, but the PDF structure and link analysis strongly suggest a malicious redirection attack.

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.ru/wb?keyword=author
    • http://nixelet.cissnaparklibrary.com/uploads/1/3/0/7/130776225/difujemadofij.pdf
    • http://foxebowa.yorktownlionsclub.com/uploads/1/3/0/7/130739826/muvex.pdf
    • http://files.jessicastockton.com/uploads/1/3/2/8/132814067/popabaliwix.pdf
    • https://cdn.shopify.com/s/files/1/0427/4556/1254/files/72069302132.pdf
    • https://cdn.shopify.com/s/files/1/0433/0926/9156/files/kinufijajopumisiwi.pdf
    • https://cdn.shopify.com/s/files/1/0435/1646/1211/files/wexorizupexajagujori.pdf
    • https://cdn.shopify.com/s/files/1/0430/6976/7842/files/89793886737.pdf
    • https://cdn.shopify.com/s/files/1/0429/9682/6273/files/revumoxeso.pdf
    • https://cdn.shopify.com/s/files/1/0434/4391/2854/files/xumejaxusaloba.pdf
    • https://cdn.shopify.com/s/files/1/0427/6705/7063/files/wesujufagunikeme.pdf
    • https://cdn.shopify.com/s/files/1/0433/7539/4979/files/rugudiwat.pdf
    • https://cdn.shopify.com/s/files/1/0432/9416/3109/files/physical_science_grade_12_siyavula_textbook.pdf
    • https://cdn.shopify.com/s/files/1/0434/0878/5562/files/12610506780.pdf
    • https://cdn.shopify.com/s/files/1/0432/9455/6324/files/benirarofurotobasosetev.pdf
    • https://cdn.shopify.com/s/files/1/0431/4287/3249/files/lufogapaketor.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_off00005189.bin
ce91f4e5f7289b235b25bc12cc85f1df55af6077def408fe4ee4fb552ac8fae3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5189 5244 bytes
font_01_sfnt_off00006380.bin
e6f8621e40c42fbeaefb9b2c8f72c7af98d31cd922f7d7fcc1db422227501616		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6380 9300 bytes

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