Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa9c0d67d2fccf41…

MALICIOUS

PDF

40.8 KB Created: 2020-08-31 06:29:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b343620a312a703d5756eaeabc937e22 SHA-1: ae459b23125c5969b7f807949d0451c1ce1450f7 SHA-256: aa9c0d67d2fccf4168f82218a3b9a6ac51da7268482c9881f4eadc861a9a012d
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with a critical heuristic firing indicating a link farm designed to redirect users to malicious infrastructure. The primary redirector URL is `https://ttraff.link/wix?keyword=classic+eyelash+extension+training+m`. While many other links point to benign Shopify domains, the presence of the malicious redirector and the ML classifier's high confidence score indicate a malicious intent to lure users to harmful content.

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.link/wix?keyword=classic+eyelash+extension+training+m
    • https://cdn.shopify.com/s/files/1/0435/4136/4890/files/dynamic_solutions_big_ideas_math_answers.pdf
    • https://cdn.shopify.com/s/files/1/0435/2622/6075/files/54851435391.pdf
    • https://cdn.shopify.com/s/files/1/0432/6883/3436/files/schedule_template_free_word.pdf
    • https://cdn.shopify.com/s/files/1/0432/4560/0936/files/solevufimawapofapezora.pdf
    • https://static.usrfiles.com/ugd/b8c837_57ce9fba7b8f487da62bb35dc16ce0a2.pdf
    • https://static.usrfiles.com/ugd/cfa91a_5fd0644ba21f4ab3a5cf36c86494c645.pdf
    • https://cdn.shopify.com/s/files/1/0428/8430/0959/files/46889077747.pdf
    • https://cdn.shopify.com/s/files/1/0440/4976/0421/files/infographic_template_microsoft_word.pdf
    • https://cdn.shopify.com/s/files/1/0461/9314/8053/files/sarivaxubodajuxovup.pdf
    • https://cdn.shopify.com/s/files/1/0430/7678/0192/files/62267072565.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_off00005ff4.bin
e0411468ffc1567105645e4a885cebf7331004d583ebc60ecee98acc293d50f6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5FF4 5288 bytes
font_01_sfnt_off000071c3.bin
6b31b4da48eb650669d1ea441b38d5c40808a4020c63dbc25ea0c9e4e4ff1b21		 pdf-font-stream PDF embedded font (sfnt) at offset 0x71C3 10844 bytes

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