Malicious PDF — malware analysis report

Static analysis result for SHA-256 6fbec2d0c984e770…

MALICIOUS

PDF

43.2 KB Created: 2020-08-12 06:53:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b724c97b466938558d6534b94ab82b6c SHA-1: e98d7e3a01dbb7639bd1f664aa53aa25e1889143 SHA-256: 6fbec2d0c984e77043b9e4a9919a319ee2486a7f48bf0ad92ae028d9cee9a4aa
154 Risk Score

Malware Insights

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

This PDF document contains numerous embedded links, with at least one identified as a redirector to malicious infrastructure. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' and 'PDF_SEO_LINK_FARM' indicate a high likelihood of this document being used to distribute malicious content or conduct phishing attacks. The ML classifier also strongly flagged this PDF as malicious.

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.cc/pify?keyword=introduction+to+functional+data+analysis+kokoszka+pdf
    • http://files.twcnpc.com/uploads/1/3/0/7/130775490/dikutomif_gasin_fudekujafijuf.pdf
    • http://files.redesignforwholefamilies.com/uploads/1/3/1/8/131857193/jowudakavesof-rusodisoton-zofokizubolas.pdf
    • http://files.omganeshayoga.com/uploads/1/3/0/9/130969652/4093051.pdf
    • http://gukivawuk.sbarcperformancehorses.com/uploads/1/3/1/4/131453046/c7c4c2351.pdf
    • http://jinabiras.linkwestapt.com/uploads/1/3/0/8/130874431/punovokosen-bizaviwibobe-gegizago.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/0470/6464/files/66841992051.pdf
    • https://cdn.shopify.com/s/files/1/0437/0323/8811/files/tusovakomidepojuluram.pdf
    • https://cdn.shopify.com/s/files/1/0432/8062/9913/files/number_theory_and_geometry_an_introduction_to_arithmetic_geometry.pdf
    • https://cdn.shopify.com/s/files/1/0428/3439/5295/files/89124784875.pdf
    • https://cdn.shopify.com/s/files/1/0437/1818/1016/files/clara_dos_anjos_lima_barreto.pdf
    • https://cdn.shopify.com/s/files/1/0436/0303/4276/files/google_docs_certificate_template.pdf
    • https://cdn.shopify.com/s/files/1/0436/6221/3273/files/69965771862.pdf
    • https://cdn.shopify.com/s/files/1/0433/4983/5930/files/17230807446.pdf
    • https://cdn.shopify.com/s/files/1/0429/3473/0911/files/makodomodivimube.pdf
    • https://cdn.shopify.com/s/files/1/0430/3391/9645/files/43041014321.pdf
    • https://cdn.shopify.com/s/files/1/0430/7025/9357/files/68904682930.pdf
    • https://cdn.shopify.com/s/files/1/0427/9920/2467/files/56552858694.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_off00006ada.bin
e59a19c1048832a859c98fcac5b2fdfe54f70910e3254dbbc9b3b50bc4a35d15		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6ADA 5300 bytes
font_01_sfnt_off00007d02.bin
079719147719947798d3d61913c81488e571e62f844ee892674e796cc4fee088		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D02 9980 bytes

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