Malicious PDF — malware analysis report

Static analysis result for SHA-256 50528912424fc3d7…

MALICIOUS

PDF

50.3 KB Created: 2020-08-31 19:53:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 76ed7b95b45d5e40fd19710d8f94c0a4 SHA-1: 3d49953962893f5e29e55a8e98fcb5fb339ecce3 SHA-256: 50528912424fc3d7fa6ac842a940f7b1ff58ff7427c2c13617cd81c8353fe813
120 Risk Score

Malware Insights

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

The PDF file contains a link that redirects to a known malicious domain, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though partially corrupted, suggests a lure related to a 'cancionero para guitarra pdf rock nacional'. The PDF_SEO_LINK_FARM heuristic indicates the presence of numerous external links, likely for SEO manipulation or to distribute the malicious redirector. The primary IOC is the malicious redirector URL.

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/pify?keyword=cancionero+para+guitarra+pdf+rock+nacional
    • https://static.usrfiles.com/ugd/63022f_fa6b8fc4b8a14502aa0b00a421886dd5.pdf
    • https://static.usrfiles.com/ugd/33a16d_3806040fbc0c4e708c6ae9cbf388ffd5.pdf
    • https://static.usrfiles.com/ugd/26481d_6455c8625f654dca927b514dc548357a.pdf
    • https://static.usrfiles.com/ugd/4b7290_73a520d653ab4119acc17c6e415523f0.pdf
    • https://static.usrfiles.com/ugd/3aca14_72a5386ca8754321b148243c1506ad0e.pdf
    • https://static.usrfiles.com/ugd/b8c837_78649abb3d80431f8a9bf0224a081a4f.pdf
    • https://static.usrfiles.com/ugd/7c30af_e3a00d9c467c4a54a7f99ee3bed977a0.pdf
    • https://static.usrfiles.com/ugd/ef253e_c1c150c4a5ab4bd5b1880bf113f0970c.pdf
    • https://static.usrfiles.com/ugd/b8c837_74a5ce99115d458bb9fffb5bc40a766f.pdf
    • https://static.usrfiles.com/ugd/57c819_a2a718f14b0f492dac98166b5d9a8739.pdf
    • https://static.usrfiles.com/ugd/f63f29_6f0b6f1ee1d046dda20e163dedda0f2c.pdf
    • https://static.usrfiles.com/ugd/b8c837_58b5d391d825494a9a8833891b854cf2.pdf
    • https://static.usrfiles.com/ugd/374ce0_6362d7beb75f49e29e275f159d5e644a.pdf
    • https://static.usrfiles.com/ugd/a31856_d0325210f53e46f1a961a9510d4ec3b1.pdf
    • https://static.usrfiles.com/ugd/eda9ba_c8577c5f0cae448dad2bfb9460d1fc7b.pdf
    • https://static.usrfiles.com/ugd/2e4eb4_51aee505afe046018cb639765ff9c1e0.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006057.bin
98ae6fccc7b767ff33bc315cb9f2b0780098e8eea5736877d38f8f1b1a9aaa64		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6057 5116 bytes
font_01_sfnt_off000071d0.bin
79f10af6d455a4a9ea3ac5ae9f6c1b67ab4fe12648ca819ed97c53642a83fe5b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x71D0 11156 bytes
font_02_sfnt_off0000964f.bin
a95eff378c135b1ab40d10b3cd1da1bafbc07f86005f57898d079c90d712ddbd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x964F 16204 bytes
font_03_sfnt_off0000ab7c.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAB7C 4324 bytes

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