Malicious PDF — malware analysis report

Static analysis result for SHA-256 b45f5e7104f42111…

MALICIOUS

PDF

40.3 KB Created: 2020-09-01 13:12:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c3416ae491e071d47831c58aab3141cb SHA-1: dc4d0df706bde3fcfb04002a493e7ac7359462e4 SHA-256: b45f5e7104f42111f4f72aad8ecd12d951daa0f86a9fe2f745889c19a5406dd6
150 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the same malicious URL. This suggests the primary intent is to redirect the user to a malicious site, likely for further exploitation or phishing. No scripts were extracted, and the PDF structure itself is the vector for the malicious link.

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.ru/wix?keyword=landlord+30+day+notice+to+vacate+template
    • https://static.usrfiles.com/ugd/a2ebd8_9d30e528652d418c94146fa160178526.pdf
    • https://static.usrfiles.com/ugd/b8c837_7c91a46af93c4a119108b1c0c0b2fed8.pdf
    • https://static.usrfiles.com/ugd/3b0c81_62d415d271004fc1ac873d280e490841.pdf
    • https://static.usrfiles.com/ugd/0dd040_e138e0fa887249a8b96c1e2bef65a722.pdf
    • https://static.usrfiles.com/ugd/2274a7_84ec9dd3f5ad4e02ac71f6d63d4d7678.pdf
    • https://static.usrfiles.com/ugd/865d50_06d45fd636824939973a8ff99852487c.pdf
    • https://static.usrfiles.com/ugd/4bdc6d_d64ea7fbbb0c431cb0542f419ccd88bf.pdf
    • https://static.usrfiles.com/ugd/1f2646_7359e4e1ec084678bc5b897c926eb7b4.pdf
    • https://static.usrfiles.com/ugd/12daa7_d224d530c9e143909ad204c63a6f9145.pdf
    • https://static.usrfiles.com/ugd/136d07_83f1178494a94b2eb9801134596433f4.pdf
    • https://static.usrfiles.com/ugd/aa14a9_9d59ea7848d546a39a718ceffbaef4a4.pdf
    • https://cdn.shopify.com/s/files/1/0428/5222/1091/files/jevufidox.pdf
    • https://cdn.shopify.com/s/files/1/0431/9143/5422/files/lowepasixizupadulola.pdf
    • https://cdn.shopify.com/s/files/1/0433/0212/5733/files/99753934579.pdf
    • https://cdn.shopify.com/s/files/1/0434/4161/9100/files/lujedefesujemavagig.pdf
    • https://cdn.shopify.com/s/files/1/0432/3088/8094/files/improper_fractions_worksheet.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_off00005fb7.bin
ea47fc1fe86852b6210f9c27c582a9ae27b1f8a83e96b87cc3ab09c2d4c96692		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5FB7 5448 bytes
font_01_sfnt_off00007239.bin
aeacb6e74214c1ec566c2e268472268d9e25d6f29cf0a52bf5a6e2219c392846		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7239 9936 bytes

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