Malicious PDF — malware analysis report

Static analysis result for SHA-256 15a79288b651b659…

MALICIOUS

PDF

43.8 KB Created: 2020-08-01 07:41:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b5690eddeb367c11b1f66b3add344229 SHA-1: b44717437f36a715fd1b83652a07323dcfbd86b5 SHA-256: 15a79288b651b6595f125e8215ae5c4f8bf5ca95999aaa713c026384e97b757b
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector URL (https://ttraff.com/pify?keyword=adobe+cc+cleaner+tool). The document body, though partially corrupted, suggests a lure related to 'Adobe cc cleaner tool', aiming to trick users into clicking the malicious links. The presence of a large number of PDF links further indicates a link farm strategy, likely for SEO poisoning or distributing further malicious content.

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.com/pify?keyword=adobe+cc+cleaner+tool
    • http://files.anthonyscafebistro.com/uploads/1/3/0/8/130874075/bbaa5.pdf
    • http://files.ejacts.com/uploads/1/3/1/3/131384018/givebivusunilujogoj.pdf
    • http://files.proedgepoolsexpress.com/uploads/1/3/1/3/131383954/luwufazuwadeg.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0431/8350/5570/files/74810401815.pdf
    • https://cdn.shopify.com/s/files/1/0435/6171/3813/files/90770545957.pdf
    • https://cdn.shopify.com/s/files/1/0437/5127/6696/files/tugewesivatebom.pdf
    • https://cdn.shopify.com/s/files/1/0432/0159/3505/files/58856118380.pdf
    • https://cdn.shopify.com/s/files/1/0429/8833/9354/files/86469956899.pdf
    • https://cdn.shopify.com/s/files/1/0431/0673/0144/files/96510011249.pdf
    • https://cdn.shopify.com/s/files/1/0435/5381/6728/files/86191791756.pdf
    • https://cdn.shopify.com/s/files/1/0433/8581/5205/files/49878308119.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/78046530146.pdf
    • https://cdn.shopify.com/s/files/1/0437/0278/0072/files/xoxejowedunegozewulagut.pdf
    • https://cdn.shopify.com/s/files/1/0429/3397/7247/files/16645884487.pdf
    • https://cdn.shopify.com/s/files/1/0430/3015/1330/files/zazibogafazedenasuweme.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_off00005ddf.bin
b36d887474dbc72e67804da6d38b5506f79614776fe26587e988677cd42d722a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5DDF 4624 bytes
font_01_sfnt_off00006d95.bin
5dae428288d7e572f39eab82a2efb18038deed291493aeb023cade083c75efda		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D95 10964 bytes
font_02_sfnt_off00009304.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9304 4324 bytes

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