Malicious PDF — malware analysis report

Static analysis result for SHA-256 31f8af45ee2f32f3…

MALICIOUS

PDF

54.0 KB Created: 2020-08-12 19:47:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5180835b35cef70de98a62fc3fcb0be7 SHA-1: a00e4391bb1e08ea1b2be221c7375413dcfbb346 SHA-256: 31f8af45ee2f32f32c55339d65dec826f229adcf2a696d6448dd1d64712702c8
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many pointing to benign Shopify domains, but one critical link directs to a known malicious redirector. The document body, though heavily obfuscated, contains the same URL, suggesting a lure to a malicious site. The presence of numerous links indicates a link farm or SEO poisoning tactic to distribute malicious content. No scripts were extracted from this sample.

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=tell+me+about+yourself+answer+for+experienced+software+engineer+pdf
    • http://files.nathanrgeorge.com/uploads/1/3/1/4/131409309/vovanurowiwe_sefevel_wubogaman_tokuzanox.pdf
    • http://files.dreamscapesiberians.com/uploads/1/3/0/7/130740490/gavivibivulibu.pdf
    • http://bulasawa.chrisandkell.net/uploads/1/3/2/6/132681352/cccb09836653b7.pdf
    • https://cdn.shopify.com/s/files/1/0433/1234/9334/files/anthelmintic_activity_of_medicinal_plants.pdf
    • https://cdn.shopify.com/s/files/1/0428/5412/1635/files/deruvexedesupamozudegil.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/rojifibopi.pdf
    • https://cdn.shopify.com/s/files/1/0430/1311/1961/files/45429546746.pdf
    • https://cdn.shopify.com/s/files/1/0431/3058/5250/files/78215097670.pdf
    • https://cdn.shopify.com/s/files/1/0433/8984/5671/files/61355983811.pdf
    • https://cdn.shopify.com/s/files/1/0430/5145/0519/files/muvon.pdf
    • https://cdn.shopify.com/s/files/1/0431/7177/4615/files/73838516310.pdf
    • https://cdn.shopify.com/s/files/1/0433/6254/9910/files/79292350644.pdf
    • https://cdn.shopify.com/s/files/1/0430/9676/8665/files/tmux_list_sessions.pdf
    • https://cdn.shopify.com/s/files/1/0430/7920/5013/files/litavepadowir.pdf
    • https://cdn.shopify.com/s/files/1/0429/9954/6010/files/27474853582.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_off00009186.bin
322d2f731a3b6ba6bcd2f2c11556ab019a289988e4ff920a44e1845760f72fcc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9186 5828 bytes
font_01_sfnt_off0000a561.bin
b8586a137d15e462b30d1a40eaee00948ed7d151b147ab609553498d463c95f8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA561 10864 bytes

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