Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ba799274f78a9d3…

MALICIOUS

PDF

42.0 KB Created: 2020-08-31 23:37:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c11553b8d2c7e8faec89bf5a76dea69c SHA-1: be0d8f07943de124c6cd821c66e55ad178984898 SHA-256: 9ba799274f78a9d3269fe1619ec0c908d2f839e0647d860be553a4f18d1b45dc
150 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, identified as a link farm, with a primary malicious redirector URL. The document body, though heavily obfuscated, contains text related to 'creative business powerpoint templates free' and the malicious URL, suggesting a lure to entice users to click on potentially harmful links. 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.com/wix?keyword=creative+business+powerpoint+templates+free
    • https://cdn.shopify.com/s/files/1/0437/1932/7896/files/kindle_formato.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kixekitigatozodevejale.pdf
    • https://cdn.shopify.com/s/files/1/0433/6300/8664/files/oxigenoterapia_scielo.pdf
    • https://cdn.shopify.com/s/files/1/0428/2440/1063/files/libekabofivofovafum.pdf
    • https://cdn.shopify.com/s/files/1/0433/9898/7926/files/ppt_presentation_slides_format.pdf
    • https://static.usrfiles.com/ugd/7f16bd_a62fc1f476af45adaf18bc08bc4a0ee6.pdf
    • https://static.usrfiles.com/ugd/b8c837_fa3fa47637e54e7f874f5f0f9805d6ec.pdf
    • https://static.usrfiles.com/ugd/b8c837_dcb5058c29704033828765542c911985.pdf
    • https://static.usrfiles.com/ugd/b8c837_3d4996c4c49c4289a8913bc5ffcd4555.pdf
    • https://static.usrfiles.com/ugd/93c935_85831a2ead0b4085a516a26c7d53ce03.pdf
    • https://static.usrfiles.com/ugd/f523c3_80b14314f12549e5a753b736240c9660.pdf
    • https://cdn.shopify.com/s/files/1/0429/5000/0791/files/25542594540.pdf
    • https://cdn.shopify.com/s/files/1/0434/4646/8769/files/dibitirofumoveveluruveseg.pdf
    • https://cdn.shopify.com/s/files/1/0435/1698/5508/files/nafego.pdf
    • https://cdn.shopify.com/s/files/1/0435/9097/5647/files/gepatatolew.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_off0000654c.bin
64f7a90fa83b4ea9dfdb1f36a9d49e3eb0323b5ad39e8bfef1e7e1c7f2c6b882		 pdf-font-stream PDF embedded font (sfnt) at offset 0x654C 5244 bytes
font_01_sfnt_off00007719.bin
3d8caa030c3226dfb28141c7887c24e4d7419307052d183315b19b73d0e9170f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7719 10416 bytes

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