Malicious PDF — malware analysis report

Static analysis result for SHA-256 364f0319e8be5a70…

MALICIOUS

PDF

37.0 KB Created: 2020-08-02 08:32:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c453d56b5273341ade65ff5ef8ce154a SHA-1: 8c619a288398859dd3a9592cd4f6cc445904ffa4 SHA-256: 364f0319e8be5a70a92ee943240c81faac9fda6735bb3349f40c81c15361c3d1
150 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, with one identified as a malicious redirector. The presence of a large link farm suggests an attempt to manipulate search engine results or distribute malicious content. The ML classifier also strongly indicated maliciousness. No scripts were extracted, and the document body was heavily obfuscated, making it difficult to determine the exact lure.

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/pify?keyword=coats+tire+machine
    • http://files.stanbrubaker.com/uploads/1/3/1/8/131856706/sarafape.pdf
    • http://files.liacorrales.com/uploads/1/3/1/1/131164002/5921021.pdf
    • http://files.pilateswithmichelle.org/uploads/1/3/1/4/131453526/877486.pdf
    • https://cdn.shopify.com/s/files/1/0429/8267/0485/files/gebonixomototexuwefexi.pdf
    • https://cdn.shopify.com/s/files/1/0435/7298/6015/files/zinejedin.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/sexewagufik.pdf
    • https://cdn.shopify.com/s/files/1/0431/8114/6280/files/73323942567.pdf
    • https://cdn.shopify.com/s/files/1/0435/5204/7272/files/fegol.pdf
    • https://cdn.shopify.com/s/files/1/0436/4635/3561/files/minecraft_tpa_plugin.pdf
    • https://cdn.shopify.com/s/files/1/0437/4380/5591/files/bebitorumewafokepini.pdf
    • https://cdn.shopify.com/s/files/1/0428/0002/1667/files/zowavakubogigafuvegov.pdf
    • https://cdn.shopify.com/s/files/1/0434/5593/8725/files/tiwabibixujonerogiwefeg.pdf
    • https://cdn.shopify.com/s/files/1/0435/4310/1591/files/12729948804.pdf
    • https://cdn.shopify.com/s/files/1/0429/6926/8373/files/nelewovazewafabitusoradi.pdf
    • https://cdn.shopify.com/s/files/1/0434/7081/5397/files/90642674443.pdf
    • https://cdn.shopify.com/s/files/1/0429/4167/7731/files/pelukeguwujufinenu.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_off00005312.bin
6ba46e7867c72455586f0c745a3ebc2c8507b5d9282f47743574170b3943c0e9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5312 4912 bytes
font_01_sfnt_off00006395.bin
97000d6132a58645bb703ea4f2e0f5b0461eead265140721c2053477550f9621		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6395 10456 bytes

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