Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce556fd53d7c7c9a…

MALICIOUS

PDF

33.7 KB Created: 2020-08-31 13:40:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 96af114e326b9b946e85f9036975cacd SHA-1: 12161c057fc3a54c9a028908296e49d3639cbc22 SHA-256: ce556fd53d7c7c9a6fedd24db7d9f86759babc3e6594ed4ae4d8ba4b5fc9b4a6
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a heuristic firing for a malicious redirector link, which is also present in the document body. This link leads to a URL that appears to be part of a link farm designed to mimic search results, likely to trick users into downloading malicious content. The ML classifier also strongly indicated maliciousness.

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=manorama+yearbook+2019+pdf++in+english
    • https://cdn.shopify.com/s/files/1/0428/9570/4227/files/vaxiwobatozafilofewovite.pdf
    • https://cdn.shopify.com/s/files/1/0447/4742/3895/files/english_test_for_beginners_doc_with_answers.pdf
    • https://cdn.shopify.com/s/files/1/0429/8326/0314/files/android_studio_gradle_wrapper_command_line.pdf
    • https://cdn.shopify.com/s/files/1/0431/1125/2132/files/55116112265.pdf
    • https://cdn.shopify.com/s/files/1/0430/0016/8597/files/fuvivigiti.pdf
    • https://static.usrfiles.com/ugd/432b07_82c7b50cee6645e2b497c679229f1c36.pdf
    • https://static.usrfiles.com/ugd/b8c837_00599d8ac6fc4720becba405955ae7e7.pdf
    • https://cdn.shopify.com/s/files/1/0430/3290/3833/files/27788994500.pdf
    • https://cdn.shopify.com/s/files/1/0430/5754/5365/files/12599012571.pdf
    • https://cdn.shopify.com/s/files/1/0432/3786/7687/files/6303260369.pdf
    • https://static.usrfiles.com/ugd/d216cb_0cee0728407e4ddd8d5e257edd3996be.pdf
    • https://static.usrfiles.com/ugd/277b62_741c420e732d4d42b5505e2c24bc2620.pdf
    • https://static.usrfiles.com/ugd/b8c837_16f82a9d0e4647529f0f844c9d51567f.pdf
    • https://static.usrfiles.com/ugd/b8c837_9c05ff1e47ad415da7fad07d651abea1.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_off00004534.bin
8cfec4fb2b5afba5f3750968abe8f41ea11bb8692047e363765159b2fae876db		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4534 6248 bytes
font_01_sfnt_off00005a65.bin
a2f00070403b0cc60924d0c22e515dc87e530b7071870447789ad833451aa890		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A65 9272 bytes

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