Malicious PDF — malware analysis report

Static analysis result for SHA-256 b8861385ad3b3547…

MALICIOUS

PDF

39.9 KB Created: 2020-08-29 18:05:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: befc0f61c891eb14302177c4ef3c3223 SHA-1: c62076b7ed846335bdad19cd8f9757723743189d SHA-256: b8861385ad3b354798a83079fd7f127e884005605e17720a64b59708c47e866a
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, which is also present in the document body. This link, 'https://ttraff.cc/wix?keyword=12.+s%2525C4%2525B1n%2525C4%2525B1f+kar%2525C5%25259F%2525C4%2525B1la%2525C5%25259Ft%2525C4%2525B1rmal%2525C4%2525B1+dinler+tarihi+cevaplar%2525C4%2525B1', is designed to lead users to malicious infrastructure. The presence of a PDF link farm heuristic further indicates a malicious intent to distribute links. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.cc/wix?keyword=12.+s%2525C4%2525B1n%2525C4%2525B1f+kar%2525C5%25259F%2525C4%2525B1la%2525C5%25259Ft%2525C4%2525B1rmal%2525C4%2525B1+dinler+tarihi+cevaplar%2525C4%2525B1
    • https://static.usrfiles.com/ugd/b8c837_d0fc3ebefc6d468abcf5a8a2e0acd464.pdf
    • https://static.usrfiles.com/ugd/b8c837_6919ffb555e6458f9eca6a2dadef92d9.pdf
    • https://static.usrfiles.com/ugd/b8c837_a107a1d0827641bd97289a95c729bf0a.pdf
    • https://static.usrfiles.com/ugd/b8c837_1a0b84e4901942d6b3c174ace78e1377.pdf
    • https://static.usrfiles.com/ugd/b8c837_1c9dc17f58ea457fae53f3754bd9556e.pdf
    • https://cdn.shopify.com/s/files/1/0435/2750/4024/files/26426903647.pdf
    • https://cdn.shopify.com/s/files/1/0435/4713/2068/files/assertion_reason_book_for_aiims.pdf
    • https://cdn.shopify.com/s/files/1/0430/5436/6877/files/46480936681.pdf
    • https://cdn.shopify.com/s/files/1/0432/0018/4477/files/shoot_em_up_movie_hdpopcorn.pdf
    • https://cdn.shopify.com/s/files/1/0431/6073/1803/files/sazafisagazodivumijowifo.pdf
    • https://cdn.shopify.com/s/files/1/0437/6900/4190/files/android_studio_generate_signed_apk_not_working.pdf
    • https://cdn.shopify.com/s/files/1/0433/9928/2845/files/wuzoxeferujekupagijosupa.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_off00005996.bin
c372db876c6c1c42187d885d6cfb95f166d639f255c8c0a3a75c986db4b8ff77		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5996 5920 bytes
font_01_sfnt_off00006d13.bin
162c0a59fc67c47a8967070b195028773e4138e5d890a982f232428783d061fc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D13 10868 bytes

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