Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2d0029450295f3e…

MALICIOUS

PDF

40.5 KB Created: 2020-07-15 05:00:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 082a390a5406e0395076cceab8f670a4 SHA-1: 8affca4e4b1c3143c1a180ba97ea44c1fdf639d6 SHA-256: a2d0029450295f3e96bf0a8fe299ee8373b4dd9d3dd4636692156b05571e5bcc
152 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, identified as a link farm, with a critical heuristic firing for malicious redirector links. The primary malicious URL identified is ttraff.ru, which likely serves as a redirector to further malicious content. The ML classifier also strongly indicated maliciousness. No scripts were extracted, limiting the analysis of direct execution capabilities.

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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=soy%20yo%20soldado%20de%20jesus%20lldm%20pdf
    • http://files.artistiquedanceacademy.com/uploads/1/3/1/6/131606395/ziwun.pdf
    • http://files.angelintuitivereader.com/uploads/1/3/1/3/131398193/mojavunoju.pdf
    • http://files.marriedmarks.com/uploads/1/3/2/8/132816158/wawezanuz-titun-resuta-ponupax.pdf
    • http://files.cvdm.info/uploads/1/3/2/6/132681882/3437217.pdf
    • http://files.marriedmarks.com/uploads/1/3/2/8/132816158/waweza
    • https://cdn.shopify.com/s/files/1/0432/9173/8277/files/36861364894.pdf
    • https://cdn.shopify.com/s/files/1/0432/6513/0658/files/niwefexunadujavopugujufa.pdf
    • https://cdn.shopify.com/s/files/1/0429/6078/1465/files/23680219622.pdf
    • https://cdn.shopify.com/s/files/1/0428/7086/6087/files/jukelam.pdf
    • https://cdn.shopify.com/s/files/1/0427/4746/1788/files/94717585462.pdf
    • https://lexaxawo.files.wordpress.com/2020/06/vusagasimimezo.pdf
    • https://jatipeku.files.wordpress.com/2020/07/47634779280.pdf
    • https://nisawutuvava.files.wordpress.com/2020/06/80395733819.pdf
    • https://fazirigiguza.files.wordpress.com/2020/07/40713460992.pdf
    • https://cdn.shopify.com/s/files/1/0432/5759/4016/files/66589843539.pdf
    • https://cdn.shopify.com/s/files/1/0430/1042/4993/files/fiwolexususijupow.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xigidewepiwunabifaw.pdf
    • https://cdn.shopify.com/s/files/1/0428/8439/9270/files/dajefuwubu.pdf
    • https://cdn.shopify.com/s/files/1/0433/7899/9446/files/74893453740.pdf
    • https://cdn.shopify.com/s/files/1/0431/8704/4510/files/mijisitemi.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xodujanizovu.pdf
    • https://cdn.shopify.com/s/files/1/0431/5794/6519/files/90091388633.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_off00005c92.bin
1638159899beda67c8bf283e71ce7c77ab07bd9536691d07d94eb29794e0945f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C92 5020 bytes
font_01_sfnt_off00006dc1.bin
9a9d10e78186908ca5fe97e01f4b47d842997bd2193835c40e323f66033be1d7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6DC1 11616 bytes

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