Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ceb06b95cc31957…

MALICIOUS

PDF

45.1 KB Created: 2020-08-29 06:50:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e7a3e47ce0c0cf87fbc1d9c87f1f9dda SHA-1: 73938c5203b689793f135b06e7426c14235d3f70 SHA-256: 0ceb06b95cc31957738aa13b2d22e65c0b86a6ce5303551e7ae5391a40a17375
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to external PDF files hosted on Shopify. One prominent link directs to a known malicious redirector. The document body, though heavily obfuscated, contains text related to 'emotional chaos to clarity' and the authoring application 'wkhtmltopdf', suggesting a lure to a malicious site. The presence of a malicious redirector and a large link farm indicates an attempt to drive traffic to potentially harmful 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/wix?keyword=emotional+chaos+to+clarity+pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0439/9484/1246/files/74439823041.pdf
    • https://cdn.shopify.com/s/files/1/0462/7942/6197/files/winaminipoku.pdf
    • https://cdn.shopify.com/s/files/1/0432/4573/2007/files/husqvarna_chainsaws_repair.pdf
    • https://cdn.shopify.com/s/files/1/0464/9756/2776/files/wrong_collection_on_my_credit_report.pdf
    • https://cdn.shopify.com/s/files/1/0433/0120/8232/files/5094440471.pdf
    • https://cdn.shopify.com/s/files/1/0432/7954/8580/files/virizubuvebulejudev.pdf
    • https://static.usrfiles.com/ugd/b8c837_3e01101c276c4def90c95f0ac247a265.pdf
    • https://static.usrfiles.com/ugd/b8c837_74a7e9162a694b34bc0a06287e79a99f.pdf
    • https://static.usrfiles.com/ugd/b8c837_e882580aa40b4d8d87df7d097397f890.pdf
    • https://static.usrfiles.com/ugd/b8c837_25c13feeb3984f12b9e95bd3a6e0c349.pdf
    • https://static.usrfiles.com/ugd/b8c837_e7dec993685842a59996048e02d31b77.pdf
    • https://cdn.shopify.com/s/files/1/0434/4017/7308/files/nikisetawelaso.pdf
    • https://cdn.shopify.com/s/files/1/0435/2173/6859/files/demetezogavurexunusete.pdf
    • https://cdn.shopify.com/s/files/1/0438/3604/7522/files/vadoterekodibusitetibigas.pdf
    • https://cdn.shopify.com/s/files/1/0431/4831/2738/files/able_lesson_plan_template_word.pdf
    • https://cdn.shopify.com/s/files/1/0430/4034/2169/files/kadifur.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_off000064fa.bin
5eaf692ff825cf03e3ce247d31b0dac96806d48a67bf99bf20b424e8567623d7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64FA 5124 bytes
font_01_sfnt_off00007633.bin
75c72479bab194a2950a81e7bf1560c79939b1360faa68df18bf1fd22f2f8760		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7633 10344 bytes
font_02_sfnt_off0000998a.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x998A 4324 bytes

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