Malicious PDF — malware analysis report

Static analysis result for SHA-256 27a3979927f8ab5a…

MALICIOUS

PDF

41.1 KB Created: 2020-08-30 18:09:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a96a815473d9e60d5ca72e3c8bfa29c1 SHA-1: 4374787ed58b1012456edaee651112c39c4fe368 SHA-256: 27a3979927f8ab5a83f6e97dd1b0525d55314ce44b7529ec2d1282b25ab900da
152 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, specifically pointing to 'https://ttraff.cc/wix?keyword=impact+1.14.3+download'. This URL is presented within the document body, suggesting a social engineering lure to trick the user into downloading or visiting a malicious resource. The PDF also contains a large number of external links, many of which point to 'static.usrfiles.com', indicating a potential link farm or distribution mechanism.

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=impact+1.14.3+download
    • https://static.usrfiles.com/ugd/a4e402_c16d0472877a4dc09fb840b285f69bdb.pdf
    • https://static.usrfiles.com/ugd/b5472a_dcdb67c786414b14b18e41aec85f0c36.pdf
    • https://static.usrfiles.com/ugd/43d598_2d7e9d063cfa4f008bb73d592c7e0926.pdf
    • https://static.usrfiles.com/ugd/b8c837_bfbe03bef4f94b789c901e4f3cd1ffa9.pdf
    • https://static.usrfiles.com/ugd/2e4eb4_cf2f4ed9087a4ef390ce35bc77b9c224.pdf
    • https://static.usrfiles.com/ugd/b8c837_f5e07f0d016147b8b28ddc512b72ef60.pdf
    • https://static.usrfiles.com/ugd/b4609a_8f9c4b25030e49b286fc63343275f69d.pdf
    • https://static.usrfiles.com/ugd/b910ae_5ed41d814fac4456a6b4091e52f87dc5.pdf
    • https://static.usrfiles.com/ugd/b8c837_ce165cd67ae64a659f15c55cebf987d1.pdf
    • https://static.usrfiles.com/ugd/451461_08a58d7e47134d6695fc9539969ce29c.pdf
    • https://static.usrfiles.com/ugd/b8c837_6a98962d20ce425584814013ffffe319.pdf
    • https://static.usrfiles.com/ugd/58a813_dd3bdbf2fc9643bbb4dc16a41c7d7deb.pdf
    • https://static.usrfiles.com/ugd/b8c837_f52213360b5940f59a8611a098400615.pdf
    • https://static.usrfiles.com/ugd/f09a9d_944c15d93d7047c9b5c086555a397168.pdf
    • https://static.usrfiles.com/ugd/a1fb72_a6244a4dabdf4720bac573f2016363ab.pdf
    • https://static.usrfiles.com/ugd/286fb8_718225c697c948b49d1daa65e6694b91.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_off000061de.bin
7243b9e2806840b2e82d857790f76abe88ecffc7f9cc13e1fc8a56eab20336e4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61DE 5308 bytes
font_01_sfnt_off000073f3.bin
f153046b7f166b02f728da744ece8676a3815fc1a84d5e5d8aa0a6420be591cc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73F3 10508 bytes

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