Malicious PDF — malware analysis report

Static analysis result for SHA-256 00e2444175fd659f…

MALICIOUS

PDF

41.5 KB Created: 2020-09-19 12:14:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: de7ffaa12704dee33120a051eb6505f3 SHA-1: 14245d2177a1c5d0fe1b5f22450eaff829bf22fa SHA-256: 00e2444175fd659f22e7b265e20715841ce39d4f34404f0393510bf26d5dabf5
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded links, many of which point to known malicious redirectors or link farms. The ML classifier strongly indicated maliciousness, and the PDF_SEO_LINK_FARM heuristic confirms the presence of a link farm designed to distribute traffic. The primary malicious URL identified is https://ttraff.club/wix?keyword=grinold+kroner+model+example, which is likely used to direct users to 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.club/wix?keyword=grinold+kroner+model+example
    • http://files.sullivanwoodart.com/uploads/1/3/1/4/131409693/0e0717.pdf
    • http://nokilo.betinamarcolin.com/uploads/1/3/0/8/130814124/faxolekani-joxomoziba-xakudukiwe.pdf
    • http://zumom.missfedak.com/uploads/1/3/1/4/131437044/jifunilet-rofojagaluduvu-tavevi.pdf
    • http://xiwil.veniceflarunners.com/uploads/1/3/0/9/130969242/469058.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/1177/6416/files/learning_numbers_in_english_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0430/7540/3936/files/70406490513.pdf
    • https://cdn.shopify.com/s/files/1/0435/1551/0938/files/29830032711.pdf
    • https://cdn.shopify.com/s/files/1/0432/4396/2532/files/buick_regal_2018_manual.pdf
    • https://cdn.shopify.com/s/files/1/0428/1604/5222/files/67371428215.pdf
    • https://cdn.shopify.com/s/files/1/0429/4157/9420/files/mujorakufes.pdf
    • https://cdn.shopify.com/s/files/1/0432/8452/9310/files/back_ups_pro_1500_apc_manual.pdf
    • https://cdn.shopify.com/s/files/1/0437/2230/9786/files/labewimo.pdf
    • https://cdn.shopify.com/s/files/1/0427/5830/8006/files/xidenegupibiwod.pdf
    • https://cdn.shopify.com/s/files/1/0436/8692/0347/files/engineering_lvl_guide_wow_classic.pdf
    • https://cdn.shopify.com/s/files/1/0432/4635/4594/files/75602651058.pdf
    • https://cdn.shopify.com/s/files/1/0430/7573/1607/files/41758383886.pdf
    • https://cdn.shopify.com/s/files/1/0440/9648/7576/files/mojaxokaxejeli.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_off0000627a.bin
b6b63cd4dbe0c8bcf608e6ef0302e644c313be5a15f7f951c3df5e303e7f1e8a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x627A 5092 bytes
font_01_sfnt_off000073b8.bin
4d46f718717bfd2bef257f628ae0ee8c408ca1b4682681a840bbf9c353ba2e9f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73B8 11076 bytes

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