Malicious PDF — malware analysis report

Static analysis result for SHA-256 34d15a428a08fb40…

MALICIOUS

PDF

42.4 KB Created: 2020-08-12 20:29:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 574a67c8bc67f039b7f5f07a31751457 SHA-1: 88900c2ef62dc5eccd7330921318184d82c48ef2 SHA-256: 34d15a428a08fb40cd197aa3e2352d855e3bdab9f95060e8b44ba38968c536e6
120 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 it as a PDF link farm. The primary malicious link, https://ttraff.ru/pify?keyword=clasificacion+de+los+canales+de+distribucion+pdf, suggests a redirection to potentially harmful content. The document body itself is heavily obfuscated and contains metadata indicating it was generated by wkhtmltopdf, a tool often used to create PDF documents from web content, further supporting the link farm hypothesis.

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=clasificacion+de+los+canales+de+distribucion+pdf
    • http://files.paulayersart.studio/uploads/1/3/0/7/130738722/navudipobebol.pdf
    • http://files.armandalegmusic.com/uploads/1/3/1/4/131408103/bd8709.pdf
    • http://tijefazip.andytheargumentativearchaeologist.com/uploads/1/3/1/4/131483281/d6ec0c7fc5392.pdf
    • http://files.jolysgardencentre.ie/uploads/1/3/1/4/131406321/miwakikanaxate.pdf
    • https://cdn.shopify.com/s/files/1/0432/3550/8387/files/traumatic_brain_injury_definition.pdf
    • https://cdn.shopify.com/s/files/1/0434/6612/9574/files/zofuxe.pdf
    • https://cdn.shopify.com/s/files/1/0428/9655/6191/files/force_mass_acceleration_problems_with_solutions.pdf
    • https://cdn.shopify.com/s/files/1/0440/6103/2598/files/sadazafefejejepebosuze.pdf
    • https://cdn.shopify.com/s/files/1/0437/0530/3205/files/14944502225.pdf
    • https://cdn.shopify.com/s/files/1/0436/8482/3205/files/wulejiduwokoligodofaxej.pdf
    • https://cdn.shopify.com/s/files/1/0428/7656/7711/files/8887514353.pdf
    • https://cdn.shopify.com/s/files/1/0429/5943/7975/files/53691659039.pdf
    • https://cdn.shopify.com/s/files/1/0432/9373/7118/files/57438666111.pdf
    • https://cdn.shopify.com/s/files/1/0431/5620/9819/files/3161892953.pdf
    • https://cdn.shopify.com/s/files/1/0433/8273/5006/files/ateten_gmlek_roman_pdf.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_off000065c6.bin
d1250417c4f7c9283be7142df5e4e16f8c15848685122cff52b33ed82af963cf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x65C6 5196 bytes
font_01_sfnt_off0000776f.bin
0bac0fe15b5358e3dfdec00d236c203278b9c73f8045894e5bec24f401642bff		 pdf-font-stream PDF embedded font (sfnt) at offset 0x776F 10920 bytes

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