Malicious PDF — malware analysis report

Static analysis result for SHA-256 061527393a0b32da…

MALICIOUS

PDF

53.0 KB Created: 2020-08-31 08:21:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4c691fdfae1b146fd709872747680dc2 SHA-1: 18e6c67afb3550c7a232ad7645691f45540f68e8 SHA-256: 061527393a0b32dafc060fc3ef0453a52efaf33e453a75bc26783902d8f2ec99
154 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as a financial accounting document. The link points to 'https://ttraff.com/wix?keyword=financial+accounting+kimmel+pdf', which is flagged as malicious. The document also hosts a large number of external PDF links, many of which are benign Shopify URLs, suggesting a link farm or SEO manipulation tactic to obscure the malicious destination.

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=financial+accounting+kimmel+pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/67572949107.pdf
    • https://cdn.shopify.com/s/files/1/0429/7339/7145/files/tchaikovsky_june_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0437/5347/2151/files/luo_sda_hymnal.pdf
    • https://cdn.shopify.com/s/files/1/0429/9712/1178/files/trizetto_facets_user_guide.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/58014629257.pdf
    • https://cdn.shopify.com/s/files/1/0432/1342/2753/files/4578528077.pdf
    • https://cdn.shopify.com/s/files/1/0428/5467/8687/files/3011707097.pdf
    • https://cdn.shopify.com/s/files/1/0432/6948/8798/files/country_code_256.pdf
    • https://cdn.shopify.com/s/files/1/0430/4447/0933/files/nonir.pdf
    • https://cdn.shopify.com/s/files/1/0434/2536/6165/files/paganini_caprice_24_violin.pdf
    • https://cdn.shopify.com/s/files/1/0437/6703/8106/files/67513251118.pdf
    • https://cdn.shopify.com/s/files/1/0430/5072/9634/files/candlelight_carol_ssa.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_off000084f4.bin
d4ae6c23c211fa2bb3d808157b36161f86789ae523a2a01d02137bab51e78958
pdf-font-stream PDF embedded font (sfnt) at offset 0x84F4 3368 bytes
font_01_sfnt_off000090f7.bin
9c4fcbb2616bae61524b91bd69ff4dd4b27e66611d40a248200612d6a87f306f
pdf-font-stream PDF embedded font (sfnt) at offset 0x90F7 5220 bytes
font_02_sfnt_off0000a2ad.bin
5f5617c9f3b9eaf62b02aab4bfaf6ee5c0ea2a47f904a0a587ae0074b2516b3f
pdf-font-stream PDF embedded font (sfnt) at offset 0xA2AD 10596 bytes