Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d551198ab73d71d…

MALICIOUS

PDF

123.1 KB Created: 2020-08-29 21:43:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5813d8ece71a496b676768571314e1b6 SHA-1: ccceae52b4a25441dbb793f1f2ffe654bf3c0eb5 SHA-256: 3d551198ab73d71d1f3a646c2b76d4080577b553508f8d84c0900cc415c83d17
120 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/wix?keyword=...'. Additionally, another critical heuristic indicates a PDF link farm, suggesting an attempt to artificially inflate search engine rankings or distribute content through numerous links. The document body itself appears to be malformed or encrypted, but the presence of these malicious links strongly suggests the PDF's purpose is to redirect users to harmful 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=%25D8%25A3%25D9%258A+%25D9%2586%25D9%2588%25D8%25B9+%25D9%2585%25D9%2586+%25D8%25A7%25D9%2584%25D9%2580+%2528%25D9%2585%25D9%2588%25D8%25B3%25D8%25AA%25D8%25A7%25D9%2586%25D8%25BA%2529+%25D9%2587%25D9%258A+%2528%25D8%25A5%25D9%2584%25D9%258A%25D9%2586%25D9%2588%25D8%25B1%2529
    • https://static.usrfiles.com/ugd/b8c837_765281d8729b4e3083c224be80ecbd8c.pdf
    • https://static.usrfiles.com/ugd/77941b_300f2d0c9cc24b77b6d66d4112358b47.pdf
    • https://static.usrfiles.com/ugd/b8c837_001f808e5be346c29c604315f1ed1e70.pdf
    • https://static.usrfiles.com/ugd/b8c837_3de774401a19459cab34877a8135017a.pdf
    • https://static.usrfiles.com/ugd/b8c837_58fbd935ab434c35adaa92c7e7515eec.pdf
    • https://static.usrfiles.com/ugd/b8c837_bb978c7614344c0fbfc7e0f353724bc2.pdf
    • https://static.usrfiles.com/ugd/b8c837_b5941054ea1c40e79392f077ee62b6cf.pdf
    • https://static.usrfiles.com/ugd/b8c837_3b5fbe4786ef4768a4884f1ebd64282f.pdf
    • https://cdn.shopify.com/s/files/1/0436/9691/4587/files/wegetitudeve.pdf
    • https://cdn.shopify.com/s/files/1/0441/2522/5112/files/33531821184.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/20116177671.pdf
    • https://cdn.shopify.com/s/files/1/0431/5339/1782/files/rakafolasajalub.pdf
    • https://cdn.shopify.com/s/files/1/0438/2556/1757/files/structural_geology_map_interpretation.pdf
    • https://cdn.shopify.com/s/files/1/0433/8001/5271/files/rise_of_skywalker_trailer_2.pdf
    • https://cdn.shopify.com/s/files/1/0429/5521/0905/files/26571445893.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_006_off00019365.bin
f39c52f7ee85a8d2c4d58f4082b25b4ccb3d406e582e558a5322a3ea5390befa		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x19365 33908 bytes
font_00_sfnt_off0001445d.bin
f1a6e326de01d77706765060f05300be41e8b25dae1fe9b468ba1cfaae16f10f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1445D 3548 bytes
font_01_sfnt_off00015026.bin
5d9972d314a4da83ac4a58aed28e0a67948c696b58a1638c0479006dc234a990		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15026 18420 bytes
font_02_sfnt_off00016d0a.bin
b112991df8f1b517af36e6ed284525559ada1ec4a0905fb7c731717eae0d6875		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16D0A 11912 bytes
font_04_sfnt_off0001cd89.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1CD89 4324 bytes

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