Malicious PDF — malware analysis report

Static analysis result for SHA-256 304aab839890f188…

MALICIOUS

PDF

56.3 KB Created: 2020-08-05 01:01:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a412cff7add680b0204c462c932b573f SHA-1: 7ca72832a3d05bc3cb2bed98a1f1a4f636f3ea27 SHA-256: 304aab839890f1883f6e17bb8edbe20b89c421c93688d010711906fe6d7c3192
150 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by a machine learning classifier and contains a critical heuristic indicating it links to known malicious redirector infrastructure. It also exhibits characteristics of a PDF link farm, with numerous embedded URLs pointing to various domains, including shopify.com. The primary malicious URL identified is ttraff.ru, which appears to be part of a redirection scheme. The document body itself contains garbled text and metadata suggesting it was generated by wkhtmltopdf.

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/pify?keyword=le+carburateur+automobile+pdf
    • http://files.sheltiesalberta.com/uploads/1/3/2/6/132695586/potora.pdf
    • http://files.uqpalaeo.com/uploads/1/3/2/6/132695714/gotekewoxone_lugatop.pdf
    • http://files.gregmoffattknives.com/uploads/1/3/1/6/131606642/d0d2609d0aa2.pdf
    • http://files.roomtowritebristol.com/uploads/1/3/1/4/131437064/7201125.pdf
    • http://jejoxosig.leannwiggins.com/uploads/1/3/0/8/130814423/038a6883b.pdf
    • https://cdn.shopify.com/s/files/1/0428/9619/5737/files/mekulu.pdf
    • https://cdn.shopify.com/s/files/1/0433/6166/5192/files/converting_ecc_pem_to_pkcs12.pdf
    • https://cdn.shopify.com/s/files/1/0428/0087/3631/files/mobonigu.pdf
    • https://cdn.shopify.com/s/files/1/0432/5759/4011/files/56853439827.pdf
    • https://cdn.shopify.com/s/files/1/0439/0112/4760/files/83841018980.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/21244882445.pdf
    • https://cdn.shopify.com/s/files/1/0429/6137/1290/files/binawanoxolaluvili.pdf
    • https://cdn.shopify.com/s/files/1/0432/4474/8950/files/nusedajigupalo.pdf
    • https://cdn.shopify.com/s/files/1/0434/8621/6352/files/80912468635.pdf
    • https://cdn.shopify.com/s/files/1/0432/4176/7072/files/nupodelukibajarelibap.pdf
    • https://cdn.shopify.com/s/files/1/0432/7977/7945/files/adjectival_phrases_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/vunazazaxukatokezidabu.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_off00009c96.bin
797a3713e014fe0f2233456ee3056ed36fb21fbab0de347b9a47fd8ddc2622e0
pdf-font-stream PDF embedded font (sfnt) at offset 0x9C96 5204 bytes
font_01_sfnt_off0000ae31.bin
a343c03733b156ac2dd87314ef00b02ae704799061f594bd9dc91ed036032756
pdf-font-stream PDF embedded font (sfnt) at offset 0xAE31 11836 bytes