Malicious PDF — malware analysis report

Static analysis result for SHA-256 e20a4894d237cb02…

MALICIOUS

PDF

42.7 KB Created: 2020-09-07 16:01:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b85a014463ca0c078cb14f30f92e6846 SHA-1: 91cbf1245f35e3ec578c93dd53d2a12c97f3361a SHA-256: e20a4894d237cb02b5f8f351b4cb3e7a3e7a50a1bce90d068a5aec59f9c6ab9c
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.me/wix?keyword=incident+report+definition+in+healthcare'. Additionally, it exhibits characteristics of a PDF link farm, embedding numerous external links, with the primary one also being a Shopify domain. The ML classifier strongly flagged this PDF as malicious. The document body, though heavily corrupted, contains text related to 'incident report definition in healthcare' and the malicious URL, suggesting a lure to entice users to click the link.

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=incident+report+definition+in+healthcare
    • https://cdn.shopify.com/s/files/1/0428/4976/3494/files/71343441046.pdf
    • https://cdn.shopify.com/s/files/1/0432/7079/9510/files/73464246075.pdf
    • https://cdn.shopify.com/s/files/1/0431/0512/4516/files/xoxajutevoto.pdf
    • https://cdn.shopify.com/s/files/1/0430/9444/2137/files/principles_of_agronomy_by_yellamanda_reddy_download_free.pdf
    • https://cdn.shopify.com/s/files/1/0430/7307/7409/files/xosanabifudutukal.pdf
    • https://cdn.shopify.com/s/files/1/0433/0238/7867/files/missouri_driving_permit_test_study_guide.pdf
    • https://cdn.shopify.com/s/files/1/0433/6844/8152/files/75046147422.pdf
    • https://cdn.shopify.com/s/files/1/0427/6387/8566/files/boruronuv.pdf
    • https://cdn.shopify.com/s/files/1/0433/3810/5000/files/34325160759.pdf
    • https://static.usrfiles.com/ugd/370b54_09db5b80f4a34fae85d2142edc78e648.pdf
    • https://static.usrfiles.com/ugd/c1de29_8d308e4051644b08b42dda34c34bc721.pdf
    • https://static.usrfiles.com/ugd/b8c837_5ebc31fccf7147f5b53ae8a6e3b817d9.pdf
    • https://static.usrfiles.com/ugd/b8c837_467bda4beffd4885a49daf1ee4c85f7e.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_off00006313.bin
89deb4526044318390237f795168917922c5642691afa384cf58e873b3042a8b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6313 5004 bytes
font_01_sfnt_off00007411.bin
60d7b49b3b3cda00504913be7431b05a7b1ea0928bc70d7316f4e0465d15f5ac		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7411 13396 bytes

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