Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ce60095d4c4c001…

MALICIOUS

PDF

42.1 KB Created: 2020-08-11 08:00:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e7ef83449370be688942950cbe28fe7d SHA-1: ee18aa4c4f83cf09688f500fdb17170a00576883 SHA-256: 5ce60095d4c4c0019e26666b49680efabb04d79e04492d50aec1002a7b2cd348
154 Risk Score

Malware Insights

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

The PDF contains a link that redirects to a known malicious URL, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains text related to a 'black s law dictionary pdf download' lure, and the PDF_SEO_LINK_FARM heuristic indicates a large number of external PDF links, suggesting a link farm or SEO manipulation tactic. 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=black+s+law+dictionary+9th+edition+pdf+download
    • http://files.garryportugal.com/uploads/1/3/0/7/130775707/1344882.pdf
    • http://files.tubitospizza.com/uploads/1/3/1/3/131384636/753891.pdf
    • http://files.madisoncommunityband.org/uploads/1/3/0/7/130776275/7995141.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0432/2361/3595/files/52971236140.pdf
    • https://cdn.shopify.com/s/files/1/0430/0813/1233/files/livros_de_baltasar_gracian.pdf
    • https://cdn.shopify.com/s/files/1/0429/8774/9529/files/informal_business_report_sample.pdf
    • https://cdn.shopify.com/s/files/1/0430/6563/9069/files/66561633758.pdf
    • https://cdn.shopify.com/s/files/1/0435/7154/4225/files/tadagivusiwi.pdf
    • https://cdn.shopify.com/s/files/1/0431/2478/5313/files/20637561001.pdf
    • https://cdn.shopify.com/s/files/1/0434/4433/8838/files/78528852464.pdf
    • https://cdn.shopify.com/s/files/1/0433/5622/5694/files/jekovuza.pdf
    • https://cdn.shopify.com/s/files/1/0432/4206/1986/files/59807080471.pdf
    • https://cdn.shopify.com/s/files/1/0429/1778/9863/files/74489180344.pdf
    • https://cdn.shopify.com/s/files/1/0434/4751/7341/files/510_343_5211.pdf
    • https://cdn.shopify.com/s/files/1/0431/7757/4562/files/83257861734.pdf
    • https://cdn.shopify.com/s/files/1/0432/4635/4592/files/tadurokariwatekale.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_off000054d2.bin
b4d59bebb530129e95dbdbe13558f33d02ec2172a8e55c80deccb97bf0b555c3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x54D2 5492 bytes
font_01_sfnt_off00006787.bin
f20a72de1fa8e95cb09bcb5a12379a304affe84a8094fd9ae5c05564f98da9af		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6787 10652 bytes
font_02_sfnt_off00008b86.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8B86 4324 bytes

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