Malicious PDF — malware analysis report

Static analysis result for SHA-256 303b3fa16c3cdfdb…

MALICIOUS

PDF

60.9 KB Created: 2020-07-19 18:38:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 024feda978538e8e26ef981f8a1a75fd SHA-1: 25d4b016a36344e58232fc48b4abbaa9fd291e2a SHA-256: 303b3fa16c3cdfdba69a92d477d30d9d75c8e55c3ae514fe1c81ea41c0398524
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, many of which point to domains associated with link farms and redirectors. The primary redirector URL is designed to lure users with a search query for 'Romance histórico livros pdf'. The ML classifier strongly indicated maliciousness, supporting the conclusion that this document is part of a phishing or malicious redirection campaign.

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.cc/wb?keyword=romance%20hist%C3%B3rico%20livros%20pdf
    • http://files.cuestacollegerodeo.com/uploads/1/3/1/4/131483550/f518ae417.pdf
    • http://files.generalpencil.com/uploads/1/3/1/1/131164456/8256704.pdf
    • http://files.sellingmomma.com/uploads/1/3/2/7/132740498/8292380.pdf
    • http://files.mochambermusic.org/uploads/1/3/2/8/132814138/7219469.pdf
    • http://files.designsbycarolann.com/uploads/1/3/0/8/130814513/ac27058e6e8.pdf
    • http://files.butterflybirths.com/uploads/1/3/1/3/131379899/3162445.pdf
    • http://files.mombodfitness.com/uploads/1/3/1/6/131637853/ead3e2176.pdf
    • http://files.chantolaspinall.com/uploads/1/3/2/7/132710683/396b9d7bc1b.pdf
    • http://files.selling
    • https://wekijun.files.wordpress.com/2020/06/38126411418.pdf
    • https://kasolelega.files.wordpress.com/2020/07/badotoretizowaj.pdf
    • https://zuzilunox.files.wordpress.com/2020/06/muludijubakotote.pdf
    • https://bunazixuvavu.files.wordpress.com/2020/06/68026594468.pdf
    • https://jedunev.files.wordpress.com/2020/06/98271821413.pdf
    • https://cdn.shopify.com/s/files/1/0429/8221/1733/files/nuwolevejere.pdf
    • https://cdn.shopify.com/s/files/1/0428/9547/4855/files/71202029439.pdf
    • https://cdn.shopify.com/s/files/1/0429/4252/9695/files/xububaw.pdf
    • https://cdn.shopify.com/s/files/1/0436/2692/2146/files/futokaneromefa.pdf
    • https://cdn.shopify.com/s/files/1/0429/6913/7305/files/45929822148.pdf
    • https://cdn.shopify.com/s/files/1/0433/1179/2286/files/66888744254.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_off0000ab33.bin
f8be8484fe1ee396c4ea61a0c1e4f0bdcc8152d73542fc92e1fce9c159311029
pdf-font-stream PDF embedded font (sfnt) at offset 0xAB33 5388 bytes
font_01_sfnt_off0000bd10.bin
ac4701d5ab14012aa6006c6e2be11467f003facc6a181d537e81d3979f5ceabe
pdf-font-stream PDF embedded font (sfnt) at offset 0xBD10 12952 bytes