Malicious PDF — malware analysis report

Static analysis result for SHA-256 f52922e9d2f34e0c…

MALICIOUS

PDF

46.1 KB Created: 2020-09-06 21:07:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0210ff435e008b6bcd41967efb92b247 SHA-1: 29f95c3b4d95eac9b1b40da4b8f5764da54b774f SHA-256: f52922e9d2f34e0cb2b4e84b4641765e3a9090f2e5aa1f0ad92d619baf5e4f49
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF was flagged as malicious due to a high number of embedded external links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.club/wix?keyword=cadeia+certificados+certisign', which is identified as a malicious redirector. Additionally, numerous other links to Shopify domains were found, suggesting a link farm or distribution network. The ML classifier also strongly indicated maliciousness.

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.club/wix?keyword=cadeia+certificados+certisign
    • https://cdn.shopify.com/s/files/1/0432/6513/0660/files/75973679221.pdf
    • https://cdn.shopify.com/s/files/1/0438/2274/3709/files/52439739974.pdf
    • https://cdn.shopify.com/s/files/1/0436/1850/0765/files/69576345074.pdf
    • https://static.usrfiles.com/ugd/b8c837_cff675cc254f44c1bde6a67e3e295c02.pdf
    • https://static.usrfiles.com/ugd/b8c837_3af5d69f79524033a29d31b85a9af94a.pdf
    • https://static.usrfiles.com/ugd/d90490_0100589b14a5484c86450540c9bc0943.pdf
    • https://cdn.shopify.com/s/files/1/0429/9233/7059/files/nutofewibuduga.pdf
    • https://cdn.shopify.com/s/files/1/0433/4151/2855/files/punotu.pdf
    • https://cdn.shopify.com/s/files/1/0430/8851/1130/files/75799505677.pdf
    • https://cdn.shopify.com/s/files/1/0430/8588/9689/files/pezudi.pdf
    • https://cdn.shopify.com/s/files/1/0433/7709/8915/files/eat_fat_get_thin_download.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/
    • https://static.usrfiles.com/ugd/b8

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006376.bin
2ce038125228ea194028ebb2cfb3180285903760efebc862df70ebd48b8617fd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6376 5064 bytes
font_01_sfnt_off000074af.bin
149738eb3e1d0bfb4a5732e89a115965e6f0cf3fc4971c694d3ce3619176544d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74AF 6148 bytes
font_02_sfnt_off0000848e.bin
a265a113ff75f502c0dac63b77dc35d96ce52d026862642da95e3f9e46eb6c39		 pdf-font-stream PDF embedded font (sfnt) at offset 0x848E 12324 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.