Malicious PDF — malware analysis report

Static analysis result for SHA-256 463a6ec9c16112ae…

MALICIOUS

PDF

43.0 KB Created: 2020-09-04 13:43:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b5e6f2044c7a7704afe9ea3a2f288c54 SHA-1: bb1fb0f1d5559d772c511a56a5b1a8ab891a4250 SHA-256: 463a6ec9c16112aeed4b89a4c6eac72d465876dbda6c8b1f155e1b541ae846a3
128 Risk Score

Malware Insights

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

The PDF file contains a link to a known malicious redirector, disguised with a keyword related to downloading software. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK confirms this, and PDF_SEO_LINK_FARM indicates a large number of similar links. The presence of a 'download button' lure further supports the malicious intent. The document body, though heavily obfuscated, contains the malicious URL and references to other PDFs, reinforcing the phishing and redirection attack pattern.

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=apple+music+apk+premium+2018
    • https://static.usrfiles.com/ugd/ced2dc_dc2695c3893c4f14abc50b4e97e537d5.pdf
    • https://static.usrfiles.com/ugd/3de8a6_3304577d8650459ea4319f8c8cc99483.pdf
    • https://static.usrfiles.com/ugd/b8c837_75d5d82399a74aec98401ac42c2378e0.pdf
    • https://static.usrfiles.com/ugd/b4f0c6_58283207f7d2472c9b10554e08e1692d.pdf
    • https://static.usrfiles.com/ugd/a59130_9c42832e317747279cb59de009148906.pdf
    • https://static.usrfiles.com/ugd/93c935_964f9613693c4fc884affcaf5e01ba34.pdf
    • https://static.usrfiles.com/ugd/2072cd_64663c9e55bf4e8b9c0c469d0c12a1b5.pdf
    • https://static.usrfiles.com/ugd/e3ff21_8d4d6a8be8444cd0b9bb1c961fc6509a.pdf
    • https://static.usrfiles.com/ugd/f08e01_f0d4316380054bd89c8f82d87c7ead48.pdf
    • https://static.usrfiles.com/ugd/fb5067_0770b48c32424973832a72702c7a2926.pdf
    • https://static.usrfiles.com/ugd/bc84a3_eb7f7398674d48a8a67847f01ed77637.pdf
    • https://static.usrfiles.com/ugd/1849a1_858848904f1048d88099c7ab09b253cf.pdf
    • https://static.usrfiles.com/ugd/3aee12_0e4ef7839ba54fa6a39668def1969533.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_off000068f4.bin
7b1d5ba356b8978fa523a2e3890a11ae9dc02f6b824dc4a75031177fcca4e420		 pdf-font-stream PDF embedded font (sfnt) at offset 0x68F4 5652 bytes
font_01_sfnt_off00007c18.bin
22ac8b563cea2a7833018576af6e830626bff5e0486aa59caaefc228335c5e76		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C18 10396 bytes

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