Malicious PDF — malware analysis report

Static analysis result for SHA-256 c4883c7f52d6c025…

MALICIOUS

PDF

47.3 KB Created: 2020-08-31 18:47:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8021df128cca432e8ebe4b1756bc82f5 SHA-1: 23cd375ea329b7aab00e48fc94427f7bf85b5a08 SHA-256: c4883c7f52d6c025cb0c53bc1df5cb8809133ba1848a435d44d287e27b4aad47
120 Risk Score

Malware Insights

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

The PDF file contains a link farm with numerous embedded URLs, including a critical redirector link to 'ttraff.ru'. The document body, though partially corrupted, contains the same search query as the redirector URL, suggesting a lure to a malicious site. The presence of multiple Shopify-hosted PDF links indicates a potential SEO poisoning or link farm strategy to distribute malicious content.

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/wix?keyword=buscar+por+foto+google+android
    • https://cdn.shopify.com/s/files/1/0434/4872/9766/files/39356968748.pdf
    • https://cdn.shopify.com/s/files/1/0432/4474/8950/files/kazarejevijukeba.pdf
    • https://cdn.shopify.com/s/files/1/0437/1664/0919/files/bunudumamu.pdf
    • https://static.usrfiles.com/ugd/c7a620_9011c59c0b01443e8834112504b0d567.pdf
    • https://static.usrfiles.com/ugd/7ff653_298db2fb55684cb68bd8eb9db3051d02.pdf
    • https://static.usrfiles.com/ugd/e4ff69_290de1d523124d6dbe1d2da3ecda17d7.pdf
    • https://static.usrfiles.com/ugd/b8c837_e6a7acd930df4189b0463412e8d27f4b.pdf
    • https://static.usrfiles.com/ugd/865d50_4f78219c4762491d8878f7d3bd92f28c.pdf
    • https://static.usrfiles.com/ugd/77eba6_5bf87978bd124db1a86af07c71e33c51.pdf
    • https://static.usrfiles.com/ugd/3b7182_335e4289e4f244758ab3a58ee21571e6.pdf
    • https://static.usrfiles.com/ugd/12f4eb_6b6b329c355e4025b6d332c20d245124.pdf
    • https://static.usrfiles.com/ugd/b8c837_dc9f49499aad4e9d969b7b51fc7e39d7.pdf
    • https://cdn.shopify.com/s/files/1/0431/4189/0208/files/rerunajosami.pdf
    • https://cdn.shopify.com/s/files/1/0433/3037/1739/files/acronis_true_image_2016_free.pdf
    • https://cdn.shopify.com/s/files/1/0427/7128/4135/files/77383864001.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_off0000766b.bin
fe8b105367f4b0c88b438d26f5367336d194ef67fc1596699f572da1b0924913		 pdf-font-stream PDF embedded font (sfnt) at offset 0x766B 5372 bytes
font_01_sfnt_off000088c2.bin
c146741f8fecfead8a4677a7cd06a422dac5427f77e7d509d6f61217c637b737		 pdf-font-stream PDF embedded font (sfnt) at offset 0x88C2 11644 bytes

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