Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f57e9c9ff81b2ae…

MALICIOUS

PDF

54.9 KB Created: 2020-08-31 16:46:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 78243aca750f8edbffc1b6fd130a56d6 SHA-1: 05c6a109ca08eca044fd975d99d356874393d18d SHA-256: 3f57e9c9ff81b2ae1886d0c2120d2d09078455c88a84afe546948dadc4877f37
120 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, identified as a link farm. One of these links, 'https://ttraff.ru/wix?keyword=beginner+ironman+training+plan+pdf', is flagged as a malicious redirector. The document body, though heavily obfuscated, contains references to training plans and the wkhtmltopdf tool, suggesting a lure to disguise the malicious intent. The presence of a link farm and a malicious redirector indicates an attempt to lead 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=beginner+ironman+training+plan+pdf
    • https://static.usrfiles.com/ugd/cc03df_dfbee538ba7147c89f2dfd3b757e17e6.pdf
    • https://static.usrfiles.com/ugd/b8c837_5423c5b111fe40129d672af19baa3b33.pdf
    • https://static.usrfiles.com/ugd/b8c837_39e6caa1872b43a28dbce8683b806f40.pdf
    • https://static.usrfiles.com/ugd/b8c837_9c315e1065d446e2ae67cf8361e2fa41.pdf
    • https://cdn.shopify.com/s/files/1/0462/0097/9606/files/79611015484.pdf
    • https://cdn.shopify.com/s/files/1/0434/7743/4525/files/sabakof.pdf
    • https://cdn.shopify.com/s/files/1/0427/6797/4556/files/babuvu.pdf
    • https://cdn.shopify.com/s/files/1/0431/5208/1053/files/salititusubasupabojem.pdf
    • https://cdn.shopify.com/s/files/1/0432/6293/5200/files/probation_officer_interview_questions_and_answers.pdf
    • https://cdn.shopify.com/s/files/1/0431/1131/7658/files/61959157159.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/53681635306.pdf
    • https://cdn.shopify.com/s/files/1/0431/4356/1373/files/bhagwat_mahapuran_sanskrit.pdf
    • https://static.usrfiles.com/ugd/ae059d_c402cd9b191848a0ad50c8c989ef8345.pdf
    • https://static.usrfiles.com/ugd/5ecadc_206730295f6145a4b5e7d1ffafff7e71.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000081aa.bin
1b78504fec7547139aefec5b54d408ac3d16236660b635c111523a78688c117b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x81AA 5020 bytes
font_01_sfnt_off00009299.bin
3a2f0395ca1cf18d4e8de0fdbafbb0bea495bf767fd5affbffe2e7c8c927f2f4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9299 14700 bytes
font_02_sfnt_off0000c0a0.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC0A0 4324 bytes

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