Malicious PDF — malware analysis report

Static analysis result for SHA-256 df800691804b89a6…

MALICIOUS

PDF

41.9 KB Created: 2020-09-11 03:43:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b8f0e70a4e85bf3e307969db17d10708 SHA-1: 2b39dabcc1e449a41e7ddc3d5f48aa6305c453a0 SHA-256: df800691804b89a64a113892e617c568b632469a5046708b4d97ac3f47e8ae63
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.club/wix?keyword=stalker+shadow+of+chernobyl+exe'. This URL is likely part of a phishing or malware distribution scheme, disguised as a game download. The document body, though heavily obfuscated, also contains this URL and other PDF links, reinforcing the lure. The ML classifier strongly supports the malicious nature of this PDF.

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.club/wix?keyword=stalker+shadow+of+chernobyl+exe
    • http://gajuwab.elukproductions.com/uploads/1/3/2/8/132814930/5113298.pdf
    • http://files.davelyonracecamps.com/uploads/1/3/2/6/132682113/lovepebitezewaxuko.pdf
    • http://files.kiamablowholebuskers.com/uploads/1/3/1/6/131606016/tulawopanobeji.pdf
    • https://static.usrfiles.com/ugd/ea78e0_a3bafe74456a4a559907e03117e72976.pdf
    • https://static.usrfiles.com/ugd/d4df0f_3443a15b81c94fa1892b9ac8b433ad13.pdf
    • https://static.usrfiles.com/ugd/70c1f8_cd4e528a025d441595efd70c987a1ca4.pdf
    • https://static.usrfiles.com/ugd/d32f78_9b82ae9fdf4342ae814cf8b59561ea12.pdf
    • https://static.usrfiles.com/ugd/cfa91a_0c9e0b81a7d84fc68b2fd2dd48aa3f9e.pdf
    • https://static.usrfiles.com/ugd/7f614e_33c1d31d8e9b4a20a56232553524bfc6.pdf
    • https://static.usrfiles.com/ugd/930050_1aca171093a6487995a15f77fd309a61.pdf
    • https://static.usrfiles.com/ugd/aa14a9_5a47571e9089411fbf0d7e5609bf2b14.pdf
    • https://static.usrfiles.com/ugd/576447_f33da298f92046869120535963c1e3c0.pdf
    • https://static.usrfiles.com/ugd/b65acf_df858bf28ef943679235754add14a8e7.pdf
    • https://static.usrfiles.com/ugd/7c1f05_74a28e3416434361931196207f3985ec.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_off00006429.bin
747fa927a19987db9cdcb90f69776a1f3244f066db1a9c3cd1020d2e0f380a24		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6429 5676 bytes
font_01_sfnt_off00007795.bin
5e2a3abe095fc50d865fa986be68c82827c3dc0d473ea95618fcf70a09d0844d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7795 10344 bytes

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