Malicious PDF — malware analysis report

Static analysis result for SHA-256 afd0cefbf5297f94…

MALICIOUS

PDF

38.3 KB Created: 2020-09-17 09:50:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 03dc5810eecce5ccfbfb6c6845251a38 SHA-1: bbf59c87a819e2a367fff46113f0fa82628fa002 SHA-256: afd0cefbf5297f9408448c67f0c132bf4cfd3c1e551e3a05806cb9348e54e5b0
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to SEO-optimized PDF documents hosted on various domains. One of these links redirects to a malicious infrastructure at 'ttraff.me'. The ML classifier also strongly indicated maliciousness. The document body contains garbled text but includes the target URL and some of the link farm URLs, suggesting a lure to a malicious site.

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.me/wix?keyword=mink+coat+mens
    • http://ropir.chrisrossarthur.com/uploads/1/3/0/8/130813528/tateresajodipubapopo.pdf
    • http://files.kanimblainternational.com/uploads/1/3/1/1/131164431/7763173.pdf
    • http://files.christthekinglodi.org/uploads/1/3/0/9/130969809/xesumizotede.pdf
    • http://peravisel.hakaro.com/uploads/1/3/0/7/130775050/87fdf4c2651fd.pdf
    • http://sonuwa.sonyaparra.com/uploads/1/3/0/7/130775478/burunazabizosukaxiv.pdf
    • http://xijipage.georgeweah.info/uploads/1/3/2/6/132695306/fibinefupo_mebawasexe_dowopimokuduf_legeju.pdf
    • http://files.relaxationretreathealthbenefits.com/uploads/1/3/1/8/131856539/5358974.pdf
    • https://8bad02ed-2586-429d-9bfc-d0d9c7995159.filesusr.com/ugd/724fb5_3cf07ded5113467290b9e575a37bdab7.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0431/1882/1530/files/baskin_robbins_job_application.pdf
    • https://cdn.shopify.com/s/files/1/0484/3215/2733/files/42261202590.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_off00004b70.bin
5113a2a9b378b88227274dcc3c402daf64283845f4fb48cdfd0f78f7c54acb0d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4B70 4672 bytes
font_01_sfnt_off00005b34.bin
36f02e2a70d400b66b7bab56be0b71a4ef6dcf4a5782cd2a7a9c46c264cec6e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B34 10428 bytes
font_02_sfnt_off00007ef7.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7EF7 4324 bytes

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