Malicious PDF — malware analysis report

Static analysis result for SHA-256 d352e1473f7365f7…

MALICIOUS

PDF

44.4 KB Created: 2020-09-06 07:39:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: deb938b61a211cad9173901267536282 SHA-1: 066c6aeba164d9499c3721a5181421dca521039c SHA-256: d352e1473f7365f781b8177dd92e353c6c7b036d7bd4c6762fee27c4016b8783
128 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.me/wix?keyword=asuran+movie+bgm++starmusiq'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded links to external PDFs, one of which is 'https://static.usrfiles.com/ugd/822ecd_36facd617f2f4931ab482cf3bdf527b9.pdf'. The document body, though heavily obfuscated, contains references to the movie 'Asuran' and the URL, suggesting a lure to entice users to click the malicious link. The presence of a 'download button' heuristic further supports the social engineering aspect of this attack.

Heuristics 4

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=asuran+movie+bgm++starmusiq
    • https://static.usrfiles.com/ugd/822ecd_36facd617f2f4931ab482cf3bdf527b9.pdf
    • https://static.usrfiles.com/ugd/d3758e_d8dc1af1ba1a4a4e9276c274ccfa4a09.pdf
    • https://static.usrfiles.com/ugd/c6ac46_c586c06e760540ee9081833d783a4669.pdf
    • https://static.usrfiles.com/ugd/0cd3a8_e38d3d857fa64df498aef21201735701.pdf
    • https://static.usrfiles.com/ugd/f08e01_a005affe7cdf440584ade0eb7ed53547.pdf
    • https://static.usrfiles.com/ugd/451461_44f741b487f9494393079f515d853bd1.pdf
    • https://static.usrfiles.com/ugd/429b25_8fbd2db4033b4480aeaec2a51c20690c.pdf
    • https://static.usrfiles.com/ugd/278743_83f7b614a8254b3ca8e5483e5a8a0804.pdf
    • https://static.usrfiles.com/ugd/6cf804_92fdef40a3c146a9939dbea2a540d48f.pdf
    • https://static.usrfiles.com/ugd/b8c837_bfc436c1bdf3466e97a9b31015e219f8.pdf
    • https://static.usrfiles.com/ugd/5f4192_a57326139879494caf09569be7f74ba8.pdf
    • https://static.usrfiles.com/ugd/2ca22b_8e214f90b7194e60884faa0054c74bac.pdf
    • https://static.usrfiles.com/ugd/c75f60_5f6e01283c834d228fd39dbcb4067b9c.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_off00004bf9.bin
b29f9350a720d2da9dc50567d08c4a82684db1fcb28a47e3a5788345b392d808
pdf-font-stream PDF embedded font (sfnt) at offset 0x4BF9 6744 bytes
font_01_sfnt_off00005cde.bin
51e4c986f323886631529b458b1a965b42f1118bc32e7803b39fe6a88de4850a
pdf-font-stream PDF embedded font (sfnt) at offset 0x5CDE 5288 bytes
font_02_sfnt_off00006ec8.bin
998ae06ab1fd0ca13acbcbff8fe64e26cde91b736af4c0fd68561a9e6f097c7b
pdf-font-stream PDF embedded font (sfnt) at offset 0x6EC8 9524 bytes
font_03_sfnt_off00008f89.bin
ea75db71c9df7250347a03039f742fcd189f5fc3f08964e696816fa8b5227073
pdf-font-stream PDF embedded font (sfnt) at offset 0x8F89 16092 bytes