Malicious PDF — malware analysis report

Static analysis result for SHA-256 44e9ce325ae13232…

MALICIOUS

PDF

46.3 KB Created: 2020-08-30 01:27:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0562c6451c06b2ae06c43accf0722786 SHA-1: eeaee032a0b7ee9ded5cef1755f06e09d751f4f0 SHA-256: 44e9ce325ae1323215f571f5b3ac91dc535058737cdf9589e5c4889a4c6866ce
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF document was flagged by multiple critical heuristics for containing malicious redirector links and a link farm. The primary malicious URL identified is https://ttraff.ru/wix?keyword=mpk+mini+editor+download, which is likely used to redirect users to a malicious site. The document also contains numerous links to Shopify-hosted PDFs, forming a link farm, which is a common tactic for SEO poisoning or distributing malicious content. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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.ru/wix?keyword=mpk+mini+editor+download
    • https://cdn.shopify.com/s/files/1/0432/8721/6293/files/46289806996.pdf
    • https://cdn.shopify.com/s/files/1/0435/0096/1947/files/complete_pet_vk.pdf
    • https://cdn.shopify.com/s/files/1/0438/0511/4528/files/logo_pop_quiz_answers_level_7.pdf
    • https://cdn.shopify.com/s/files/1/0430/0436/2906/files/jekibexolusi.pdf
    • https://cdn.shopify.com/s/files/1/0437/4737/7301/files/xubino.pdf
    • https://static.usrfiles.com/ugd/4f270c_34e983ee682c4d129318a507c85b3f57.pdf
    • https://static.usrfiles.com/ugd/f96b02_f11f9cd169064e7893441d7fb6e8c6b2.pdf
    • https://static.usrfiles.com/ugd/b8c837_11f23be4674c416ebfa7e960a66256f8.pdf
    • https://static.usrfiles.com/ugd/0049ca_e0fd0f8322594b76aefd3e0e276281cc.pdf
    • https://static.usrfiles.com/ugd/f103bb_bc87f40825f44cd29b268897cc9cbe38.pdf
    • https://static.usrfiles.com/ugd/6c98bc_339e8f0005e44d2bb4cf0ed95b9c157b.pdf
    • https://static.usrfiles.com/ugd/b8c837_2b14eb682f704021adc5dfbf9910e8c5.pdf
    • https://static.usrfiles.com/ugd/b8c837_c8142de937284c0bae0337000f31f25a.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007909.bin
e4131e0fffb4bccf54dfe7a23c2b4f229fe03406cf01ee777fb4b75cdad4bf8a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7909 5088 bytes
font_01_sfnt_off00008a4f.bin
2ce20c6ee469bbb1978f86c5322a2d337d67ee90aa37b511b7de9bf020118b60		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8A4F 10188 bytes

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