Malicious PDF — malware analysis report

Static analysis result for SHA-256 9429186b026830ff…

MALICIOUS

PDF

39.1 KB Created: 2020-08-29 04:11:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0754ea10a9ea26bf30ec683c0b0ba3a7 SHA-1: dc02b777b5aafeb98d7012fb8955ae9f8b7a886e SHA-256: 9429186b026830ff86ce0d057efcb18008084cb609bad221c3406ba1c537c9bf
152 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.me, which is disguised with a lure related to a "Mew mystery gift code ultra sun". The document also contains a large number of links to static.usrfiles.com, likely part of a link farm to improve SEO for malicious content. The ML classifier strongly flagged this PDF as malicious. No scripts were extracted, but the primary attack vector appears to be social engineering via a deceptive document title and a malicious URL.

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.me/wix?keyword=mew+mystery+gift+code+ultra+sun
    • https://static.usrfiles.com/ugd/b8c837_40dbcdf10ff84d5dbb6ccb3f84381f72.pdf
    • https://static.usrfiles.com/ugd/b8c837_bbb0d3a6468c4f348c6ca5ee6f45e002.pdf
    • https://static.usrfiles.com/ugd/b8c837_7cd417099fbe43bab6571aadcc5f7d5b.pdf
    • https://static.usrfiles.com/ugd/b8c837_7510d818051148e49b8980feaab1a3b7.pdf
    • https://static.usrfiles.com/ugd/b8c837_d17552b164244daab654726789373449.pdf
    • https://static.usrfiles.com/ugd/b8c837_c23f1188a5154b8980cb8176da2cb52b.pdf
    • https://static.usrfiles.com/ugd/b8c837_b69df0ea13814eb6a66580d3feee5dd0.pdf
    • https://static.usrfiles.com/ugd/b8c837_7900aad78a7248fb8090deac27da0b7c.pdf
    • https://static.usrfiles.com/ugd/b8c837_496b057afb8d4dd8bef8a6d1c2d62ece.pdf
    • https://static.usrfiles.com/ugd/b8c837_a95941689db5425b9f4a0dd5103113fd.pdf
    • https://static.usrfiles.com/ugd/b8c837_d078420971214a67ad774ede501d4b52.pdf
    • https://static.usrfiles.com/ugd/b8c837_3a8f1a9597654616a077a12e8ce25a2d.pdf
    • https://static.usrfiles.com/ugd/b8c837_e743e309f0464d0c8406f27b12852f59.pdf
    • https://static.usrfiles.com/ugd/b8c837_bb82a22829c948088fe3de00d5cd58b0.pdf
    • https://static.usrfiles.com/ugd/b8c837_831429a911fb4c8d8575bd1f4600c878.pdf
    • https://static.usrfiles.com/ugd/b8c837_a4896846267a44788b3369099de04883.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_off00005971.bin
02a5191028dcd5d37c0be176f77a11a57a31d0b1f38ce50705f72f2e1a59f5cd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5971 5540 bytes
font_01_sfnt_off00006c48.bin
6d8f331faca581868636cfe4c096a308d308a58542c41fe8b1d3d0658c0d7eac		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C48 10432 bytes

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