Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c48b3cada905c37…

MALICIOUS

PDF

43.8 KB Created: 2020-08-29 20:45:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 015c560b9fe6034f8bccde247afef6fc SHA-1: 45f03e0c04a0879e0759ceebf8bbf92872bb0512 SHA-256: 4c48b3cada905c3724ceac3a9bbaeb4c3716b33b986dc8051fe4a739990f472c
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. One of these links, 'https://ttraff.cc/wix?keyword=sunet+anti+caini', points to known malicious redirector infrastructure. The primary purpose appears to be directing users to potentially harmful content through a deceptive link farm.

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.cc/wix?keyword=sunet+anti+caini
    • https://static.usrfiles.com/ugd/07e02c_9fff6ca544b349e49999c42608014dd8.pdf
    • https://static.usrfiles.com/ugd/b85eb0_4cffaeb4d15a44708150769287dad629.pdf
    • https://static.usrfiles.com/ugd/b8c837_4c5d16abe8724c6e8d96a30362a1b6ce.pdf
    • https://static.usrfiles.com/ugd/136d07_c8406a634cb44f4c80c081f05ab420a2.pdf
    • https://cdn.shopify.com/s/files/1/0432/3164/1762/files/chiller_trane.pdf
    • https://cdn.shopify.com/s/files/1/0435/4431/4024/files/37387107780.pdf
    • https://cdn.shopify.com/s/files/1/0432/5169/5771/files/62626378382.pdf
    • https://cdn.shopify.com/s/files/1/0437/0789/1877/files/sad_love_breakup_whatsapp_status_video.pdf
    • https://cdn.shopify.com/s/files/1/0431/6217/3604/files/nice_guidelines_neonatal_sepsis_2012.pdf
    • https://cdn.shopify.com/s/files/1/0435/6617/0271/files/how_to_use_an_abacus_step_by_step.pdf
    • https://cdn.shopify.com/s/files/1/0433/8758/4677/files/fagidipixutenoxavovobaf.pdf
    • https://cdn.shopify.com/s/files/1/0433/3630/2750/files/count_items_in_list_python.pdf
    • https://cdn.shopify.com/s/files/1/0435/3540/1111/files/career_personality_test.pdf
    • https://cdn.shopify.com/s/files/1/0434/8860/8418/files/29824851909.pdf
    • https://cdn.shopify.com/s/files/1/0445/5025/8852/files/quality_assurance_manager_interview_questions_and_answers.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_off00006f8a.bin
792c8d349d52db6b7a37adef3dec45466100684fa4cba8d4bf53a43e501e5840		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F8A 4592 bytes
font_01_sfnt_off00007f30.bin
6581e771d52c02df9d189667037c465b172b44e247ec5e9a31944b92869fc461		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F30 10360 bytes

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