Malicious PDF — malware analysis report

Static analysis result for SHA-256 27f2cd610ac73b1a…

MALICIOUS

PDF

32.0 KB Created: 2020-11-03 07:54:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: bdf4ab447353c0e89dfca0489de58fa9 SHA-1: 8aec5047b4016907618a13128b938154b0b5665f SHA-256: 27f2cd610ac73b1ae75e098bfac61f11259992845ef91c28315bb53c92f1c8e8
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded URLs, many of which point to link farms designed to manipulate search engine results. One prominent URL, https://ggtraff.ru/strik?keyword=charlie+s+italian+bistro+ramsay, is identified as a malicious redirector. The ML classifier also strongly indicated maliciousness. The document body contains garbled text but includes the same suspicious URLs, suggesting an attempt to disguise or deliver them.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9967

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://ggtraff.ru/strik?keyword=charlie+s+italian+bistro+ramsay In PDF document text
    • https://cdn-cms.f-static.net/uploads/4393364/normal_5f8eb572d2d56.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407086/normal_5f9c1e7e080ea.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372955/normal_5f8891b7b8faa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369760/normal_5f8bb09d26cef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366389/normal_5f87552f53743.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407070/normal_5f96d1ae20048.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366407/normal_5f934ffeae2f7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372735/normal_5f893bb2c9701.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403951/normal_5f968e9ee7dc9.pdfIn PDF document text
    • https://s3.amazonaws.com/lijulijowivaze/82041314737.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0503/1146/3076/files/the_crucible_act_3_study_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/widiku/23022333193.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/9978/9749/files/pocket_tarneeb_mod_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/vuzufexarevima/wifi_password_hack_v5_apk_android_download.pdfIn PDF document text

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