Malicious PDF — malware analysis report

Static analysis result for SHA-256 b54f78c99d7c7a05…

MALICIOUS

PDF

47.7 KB Created: 2020-08-29 18:12:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7c6376f91abd3a20078a155b8ee3ab3c SHA-1: 73b2ca38322b1a2699048281a5e8a31437319763 SHA-256: b54f78c99d7c7a0593057ac44a45215db9e1ee313ed8e07ba4de612886e80758
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic firing indicating a malicious redirector at 'https://ttraff.ru/wix?keyword=metodo+de+purificacion+de+proteinas+por+dialisis'. The document body, though heavily obfuscated, contains text related to protein purification and the URL itself, suggesting a lure to disguise malicious intent. The presence of a link farm further supports the malicious nature of the document, aiming to drive traffic to potentially harmful sites.

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.ru/wix?keyword=metodo+de+purificacion+de+proteinas+por+dialisis
    • https://static.usrfiles.com/ugd/b8c837_85da2e815a04463ca0461b7aa322d485.pdf
    • https://static.usrfiles.com/ugd/b8c837_a21f28d8f01041dbaa3e5affb1b8db98.pdf
    • https://static.usrfiles.com/ugd/b8c837_0eb15c813e9b41e5926cdd94b6d46cd7.pdf
    • https://static.usrfiles.com/ugd/b8c837_883c4b7ccc9a43698a4e73b2dc099854.pdf
    • https://static.usrfiles.com/ugd/b8c837_b4a0729e245046edae04b76f9e289909.pdf
    • https://cdn.shopify.com/s/files/1/0430/0849/1673/files/ansys_apdl_command_reference.pdf
    • https://cdn.shopify.com/s/files/1/0435/7708/2019/files/duxajutujolimizuzil.pdf
    • https://cdn.shopify.com/s/files/1/0431/6830/1212/files/dosabepupun.pdf
    • https://cdn.shopify.com/s/files/1/0430/8526/7097/files/dbz_dokkan_lr_androids.pdf
    • https://cdn.shopify.com/s/files/1/0435/7141/3160/files/patriotism_and_nationalism.pdf
    • https://static.usrfiles.com/ugd/b8c837_a7543a49c0ef427ab294ad4b80b9a20b.pdf
    • https://static.usrfiles.com/ugd/b8c837_d35862a6fabe4deaa45b4555f8f02bd8.pdf
    • https://static.usrfiles.com/ugd/b8c837_5d8dc1a71c5049d3bb32f148367213dc.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_off000070e1.bin
9a98723dae936e7c7c8d502cfbcf27bf9f93cff28ba6a06675a6a95244fbc4de		 pdf-font-stream PDF embedded font (sfnt) at offset 0x70E1 1696 bytes
font_01_sfnt_off0000790b.bin
7569a819be6e110cc134fa4886960e6dc9dbc2f119a7f689d7713111b32ac7b6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x790B 5156 bytes
font_02_sfnt_off00008aae.bin
7f9f376b27150690c65435fc4d659c63d3573824a058e84629347a70acfc147e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8AAE 11540 bytes

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