Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a86e275c00a4ead…

MALICIOUS

PDF

33.9 KB Created: 2020-09-14 22:21:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2a09024a53b6e36cb02ddea7b0e11ef4 SHA-1: ffa096d89ae2f19601bb8a43e80b3c9891a2d5d9 SHA-256: 2a86e275c00a4ead1f52f396eca34a859cfe2e899585670ab2cf613caba1d40a
154 Risk Score

Malware Insights

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

The PDF contains a mass external link farm and a critical redirector link to 'https://ttraff.club/pify?keyword=discord+spammer+online'. This indicates a likely attempt to direct users to malicious content. The ML classifier strongly flagged this PDF as malicious. No scripts were extracted, but the presence of numerous links and the redirector strongly suggest a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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.club/pify?keyword=discord+spammer+online
    • http://julozusa.kansascitywriters.com/uploads/1/3/2/7/132740865/nagasaderaril.pdf
    • http://vowipeluj.realhopeyouthcenter.net/uploads/1/3/2/6/132680896/3231892.pdf
    • http://kepuxofu.thecrowseyeview.com/uploads/1/3/1/4/131411688/7119824.pdf
    • https://static.usrfiles.com/ugd/575fb0_3007ce8ae54d46fdbcf77c1c1da20073.pdf
    • https://static.usrfiles.com/ugd/93c935_3074d859fba24119bdc81dd059aade35.pdf
    • https://static.usrfiles.com/ugd/724bd4_30343bcfdcda469c8b21120aa1740208.pdf
    • https://static.usrfiles.com/ugd/61804c_ae800e3e02ae439f8b06e007bb161588.pdf
    • https://static.usrfiles.com/ugd/229b11_140d66474d0641acae164e7a22bde7d5.pdf
    • https://static.usrfiles.com/ugd/5ad03d_2f14927a484744638c3f9cea6327dc15.pdf
    • https://static.usrfiles.com/ugd/811c4f_6e0d63eebac646cab5954b8f2f3d8a37.pdf
    • https://static.usrfiles.com/ugd/cac9e4_346328eea4e24d6fbb7e4172828c6545.pdf
    • https://static.usrfiles.com/ugd/05301a_c37886c4c41f44a59cce0fedac5d323b.pdf
    • https://static.usrfiles.com/ugd/98857b_30d96b8b43aa400590e025a4bdd54c96.pdf
    • https://static.usrfiles.com/ugd/911c12_73fb5adac73840b8a6a10ec1b67f311b.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_off000046f6.bin
ebd5cb2ab76078c6af582b2ce332ba028b44dbddf50b90117cd0a862a5223f85
pdf-font-stream PDF embedded font (sfnt) at offset 0x46F6 5220 bytes
font_01_sfnt_off000058a1.bin
0ec7a97ef2e5592a9505dd1520730407a21adbf97cc93cc702907078cc1486fc
pdf-font-stream PDF embedded font (sfnt) at offset 0x58A1 10128 bytes