Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a0a30508a56296f…

MALICIOUS

PDF

129.1 KB Created: 2020-08-05 01:33:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 402602489b15636420c0eca9fcf64531 SHA-1: e590b6a093fbad2c99b57354900e203f2c5dde29 SHA-256: 6a0a30508a56296f01581cc68b9c441b8d02c4e1999ec8e74fc7832286e91526
154 Risk Score

Malware Insights

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

The PDF contains numerous links, including one pointing to a known malicious redirector at 'ttraff.ru'. The document body, though heavily obfuscated, contains text related to legal documents and the URL 'https://ttraff.ru/pify?keyword=tratado+de+direito+penal+1+cesar+roberto+bitencourt+pdf', suggesting a lure. The presence of embedded URLs and the ML classifier's high confidence indicate malicious intent, likely to redirect users to a phishing or malware download site.

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.ru/pify?keyword=tratado+de+direito+penal+1+cesar+roberto+bitencourt+pdf
    • http://files.madlyeclectic.com/uploads/1/3/1/4/131483253/nuwitoduku_xafozovininu_lekilirox_navagad.pdf
    • http://files.blwcenter.org/uploads/1/3/0/7/130740323/8794972.pdf
    • http://ximobugo.ccis.ccsdtitle1.org/uploads/1/3/1/4/131407227/sonepejokoxekelese.pdf
    • http://files.publishedbywestview.com/uploads/1/3/1/4/131453665/rilokoxofezomo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/2408/9242/files/jedozeletovotoxujogur.pdf
    • https://cdn.shopify.com/s/files/1/0432/9239/3640/files/vocabulary_for_ielts_general_training.pdf
    • https://cdn.shopify.com/s/files/1/0434/5374/3270/files/456684938.pdf
    • https://cdn.shopify.com/s/files/1/0428/7099/7151/files/jufirediwa.pdf
    • https://cdn.shopify.com/s/files/1/0432/3871/9648/files/18951731492.pdf
    • https://cdn.shopify.com/s/files/1/0428/0995/0367/files/80999618546.pdf
    • https://cdn.shopify.com/s/files/1/0437/8548/6498/files/38769484000.pdf
    • https://cdn.shopify.com/s/files/1/0434/6629/3401/files/surevukarufuru.pdf
    • https://cdn.shopify.com/s/files/1/0430/9660/4825/files/pimebivegusuxipoj.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/sakemiribukewud.pdf
    • https://cdn.shopify.com/s/files/1/0437/7850/6909/files/20835465290.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00019781.bin
0c3bb3743a3f512b91db20b365c3e3fdadd4d36efc2776d9adca525ea671a3fd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x19781 5292 bytes
font_01_sfnt_off0001a987.bin
31068b2bad4d3ba85b89b6eb481ba32c872b9aa2f01659ff04bcc57d2ac0d8f8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1A987 19784 bytes
font_02_sfnt_off0001e0fd.bin
1a543d9e2c81fda3913d50c0d54720f796d7f68d6d3139d1637af9699209b7db		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1E0FD 16160 bytes

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