Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ac7d126d30dbdac…

MALICIOUS

PDF

74.4 KB Created: 2020-09-11 12:54:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6591f394f3c95e48680a029d12739f75 SHA-1: e0a5d0a256f4169bc138eec698f33baee22785a0 SHA-256: 7ac7d126d30dbdaca8cb77269cf670febac669ca9019b85f18753b98a59f2344
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links, with one critical heuristic identifying it as a redirector link pointing to 'https://ttraff.me/wix?keyword=atalanta+calcio+formazione+titolare'. Another heuristic indicates a link farm, suggesting the PDF's primary purpose is to distribute traffic to external sites. The ML classifier strongly supports the malicious nature of this PDF.

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.me/wix?keyword=atalanta+calcio+formazione+titolare
    • http://files.baileylrosadesigns.com/uploads/1/3/2/6/132681773/zasakaw.pdf
    • http://files.deewiegand.com/uploads/1/3/0/9/130969169/pokejove.pdf
    • http://gilowarer.bennyzrodshop.com/uploads/1/3/1/8/131857114/23faa5d06f3.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/1c8c1e_58c54b7583764359be38a6bb6a59f94b.pdf
    • https://static.usrfiles.com/ugd/b8c837_b47d83bc26854d53be8abf5ebdd4ab79.pdf
    • https://static.usrfiles.com/ugd/d94ae5_c0ec417fba684bb68e862c7a67bd8ec3.pdf
    • https://static.usrfiles.com/ugd/a2d007_f4a529b6ede74272bec2de435b6b62ca.pdf
    • https://static.usrfiles.com/ugd/de60da_a4064467ee744ccfa674f4ea564588ea.pdf
    • https://static.usrfiles.com/ugd/87ad98_f76fa1d0c2ee4c4cb0be0e0ca236aa49.pdf
    • https://static.usrfiles.com/ugd/36d413_c2b9002b9cf84d6a8ab632450e31814d.pdf
    • https://static.usrfiles.com/ugd/9374a7_855f58b4241f40358d05a5a59159e1aa.pdf
    • https://static.usrfiles.com/ugd/2f3ac6_fcb4d7fe5834452ab364905d4f3e82e3.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bf77.bin
e055b490b4929b65b03118df918eb1855dcaf4405dfcb310abe6c7013fa5c0f8
pdf-font-stream PDF embedded font (sfnt) at offset 0xBF77 7140 bytes
font_01_sfnt_off0000d797.bin
c33f91ec4a240a453efcde062e31ba3fcff77285b7ecb82c0add6b2ceb10ee92
pdf-font-stream PDF embedded font (sfnt) at offset 0xD797 4888 bytes
font_02_sfnt_off0000e82c.bin
8a3b25c5f1042f10a7ea3a47a495327741465c03eee0d60d02a578319d0c00aa
pdf-font-stream PDF embedded font (sfnt) at offset 0xE82C 16508 bytes