Malicious PDF — malware analysis report

Static analysis result for SHA-256 66028d71bb904090…

MALICIOUS

PDF

42.9 KB Created: 2020-08-05 17:23:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8e3a3ac66eee344108fc28c6667fc491 SHA-1: 7d87605113a39c72516814cfa5c58983f4b899c1 SHA-256: 66028d71bb9040901ec1427ede80b1cd9ce6fb8d9fe966294b93fd78bb3cdb48
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link farm with 30 external PDF links, many of which point to benign Shopify URLs, but one critical link redirects to a known malicious domain. The ML classifier also flagged this PDF with high confidence. The embedded URL in the document body, 'https://ttraff.ru/pify?keyword=niche+sites+with+affiliate+marketing+for+beginners+pdf', is the primary indicator of malicious intent, likely serving as a redirector to a phishing or malware distribution site.

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.ru/pify?keyword=niche+sites+with+affiliate+marketing+for+beginners+pdf
    • http://files.nancymaldonado.com/uploads/1/3/0/8/130874110/rafaruke_xujuxuwep.pdf
    • http://files.lifewithpetsgci.com/uploads/1/3/1/3/131380480/nasitawomekefaforepo.pdf
    • http://files.froggyplaces.net/uploads/1/3/1/8/131857758/wazubipagatu.pdf
    • http://files.mod-el.org/uploads/1/3/1/4/131453990/lelajud.pdf
    • http://files.wildapplesfloral.com/uploads/1/3/0/7/130738554/3728160.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/9033/7189/files/scrambled_sentences_worksheets_4th_grade.pdf
    • https://cdn.shopify.com/s/files/1/0433/6127/1959/files/kayla_itsines_guides_free.pdf
    • https://cdn.shopify.com/s/files/1/0432/5307/2022/files/57828061425.pdf
    • https://cdn.shopify.com/s/files/1/0437/8771/4721/files/tivuzanaruvovitogilejev.pdf
    • https://cdn.shopify.com/s/files/1/0431/9969/2958/files/finor.pdf
    • https://cdn.shopify.com/s/files/1/0438/2598/7734/files/lafomemo.pdf
    • https://cdn.shopify.com/s/files/1/0440/6870/0310/files/mistweaver_monk_guide.pdf
    • https://cdn.shopify.com/s/files/1/0433/8515/9843/files/71938701522.pdf
    • https://cdn.shopify.com/s/files/1/0429/5327/7589/files/volodos_rachmaninoff_cello_sonata_pdf.pdf
    • https://cdn.shopify.com/s/files/1/0430/8677/4436/files/15296650220.pdf
    • https://cdn.shopify.com/s/files/1/0434/4800/8866/files/lubilelenin.pdf
    • https://cdn.shopify.com/s/files/1/0431/1403/7397/files/gidugef.pdf
    • https://cdn.shopify.com/s/files/1/0437/1464/2070/files/pefikadidokakigusogo.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_off00006700.bin
5bf47faf59b9fbb93af131c4cb9cd7b21d402e626bab47283ae70a7374662be1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6700 5836 bytes
font_01_sfnt_off00007acd.bin
dafb537457aedc3aee11264c1be1ee1a377cb8cad34b58dc2ffc1f6a5861c16b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7ACD 10412 bytes

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