Malicious PDF — malware analysis report

Static analysis result for SHA-256 4886180e9b5f444e…

MALICIOUS

PDF

39.1 KB Created: 2020-10-24 10:09:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ef80ad5e3869b5d45515454399ccc4df SHA-1: e3ecca2802c6d81e80760af66d1f93240a460d22 SHA-256: 4886180e9b5f444e332e1ee27cffd71928b2ae0cf973ae769515acc05b468ae1
102 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing indicating it links to known malicious redirector infrastructure. The embedded URL, https://cctraff.ru/strik?keyword=california+snax+kale+chips, is identified as a malicious redirector. The document body, though heavily obfuscated, also contains this URL, suggesting its primary purpose is to lure the user to this malicious site. No scripts were extracted, but the presence of a malicious URL strongly suggests 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://cctraff.ru/strik?keyword=california+snax+kale+chips
    • https://cdn-cms.f-static.net/uploads/4390092/normal_5f8db251ee795.pdf
    • https://cdn-cms.f-static.net/uploads/4379837/normal_5f8b36f2ac6d7.pdf
    • https://gemaxudemaxepeb.weebly.com/uploads/1/3/1/0/131070646/makotu.pdf
    • https://jopegivev.weebly.com/uploads/1/3/4/2/134234712/zukamexupa-boxisitej-pebawumuvoteze.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/a981e7cd-43f4-4a39-aa57-36c73d0b3320/33611436581.pdf
    • https://uploads.strikinglycdn.com/files/c7eda31e-e6bc-4a5b-bd57-f9dfcc1cf44e/17206423533.pdf
    • https://uploads.strikinglycdn.com/files/d3537e90-43ca-40a7-b72f-1da5ec0786bf/vunogaredobexaj.pdf
    • https://uploads.strikinglycdn.com/files/c582fa06-c896-4db8-aff3-a7b94acc1637/42756736520.pdf
    • https://cdn.shopify.com/s/files/1/0500/7350/1884/files/26387309026.pdf
    • https://cdn.shopify.com/s/files/1/0433/6753/0655/files/13404888267.pdf
    • https://s3.amazonaws.com/leguvefu/bourse_maroc_2019.pdf
    • https://s3.amazonaws.com/sitok/basic_computer_application_notes.pdf
    • https://s3.amazonaws.com/xanebavifamopez/53507376847.pdf
    • https://s3.amazonaws.com/vitelitubovuluj/vesefebumejeluvepojeref.pdf
    • https://s3.amazonaws.com/memul/39461019059.pdf
    • https://s3.amazonaws.com/fusidejebi/63696110678.pdf
    • https://s3.amazonaws.com/remufuzu/bokideselepixafitisano.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000579b.bin
e0df41200c29f211e9a088ec0c6b0e3f40dfabbd5e9ecb2431d2c1a32587a9a9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x579B 5140 bytes
font_01_sfnt_off00006917.bin
50aece653f994e0dce5207a3c5af07571ad31497afcce44c09a8958f18cb5cc8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6917 12140 bytes

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