Malicious PDF — malware analysis report

Static analysis result for SHA-256 3da084879bc5f309…

MALICIOUS

PDF

61.0 KB Created: 2020-08-25 16:53:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 439c127263704e4af29e2f0f7b666f6f SHA-1: 81926075b992a0fbfa409ecf9664375ae3cd3d45 SHA-256: 3da084879bc5f30997bd2f28044adbb1a9e94b19d4a2efa15cc9cee5e32bc9f4
120 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, directing users to 'https://ttraff.ru/pify?keyword=arnold+chiari+malformation+with+syringomyelia'. Additionally, it exhibits characteristics of a PDF SEO link farm, embedding numerous external links, many of which point to Shopify domains hosting PDF files. The document body, though heavily obfuscated, contains references to the malicious URL and benign-looking PDF links, suggesting a lure to drive traffic to malicious infrastructure. No scripts were extracted from this sample.

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=arnold+chiari+malformation+with+syringomyelia
    • http://dozunajek.kira-marie-mccullough.com/uploads/1/3/1/4/131453558/kilabo.pdf
    • http://files.elizabethkpetersonlab.com/uploads/1/3/1/3/131384789/sibufajoj-xuvini.pdf
    • http://gofapu.sacramentoatcurrentspeed.com/uploads/1/3/0/7/130739873/59ed8b52d8ab398.pdf
    • http://files.redcoatmodels.com/uploads/1/3/0/7/130740175/6877460.pdf
    • http://rubilo.agbio-inc.com/uploads/1/3/2/6/132683130/316ed0b4faced.pdf
    • https://cdn.shopify.com/s/files/1/0432/6604/8165/files/18032628532.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/35022180152.pdf
    • https://cdn.shopify.com/s/files/1/0435/6515/4463/files/sheet_basant_ke_nach_program_bidesiya_video.pdf
    • https://cdn.shopify.com/s/files/1/0431/8344/0030/files/arpegios_para_guitarra_clasica.pdf
    • https://cdn.shopify.com/s/files/1/0435/4048/0164/files/sefawesipori.pdf
    • https://cdn.shopify.com/s/files/1/0432/7093/0600/files/vati_rn_comprehensive_predictor.pdf
    • https://cdn.shopify.com/s/files/1/0438/2982/1600/files/sofagitafifazufi.pdf
    • https://cdn.shopify.com/s/files/1/0435/5883/0231/files/abductive_reasoning_douglas_walton.pdf
    • https://cdn.shopify.com/s/files/1/0437/8935/3120/files/33370189416.pdf
    • https://cdn.shopify.com/s/files/1/0432/6978/3720/files/tapozef.pdf
    • https://cdn.shopify.com/s/files/1/0433/2381/8139/files/15179546507.pdf
    • https://cdn.shopify.com/s/files/1/0434/3041/2454/files/75416247960.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_off0000afa7.bin
5746112b7e429f5b29c1621276ce9dd8a99793d62e7bfd3dc9c0b29c17f280f1
pdf-font-stream PDF embedded font (sfnt) at offset 0xAFA7 5620 bytes
font_01_sfnt_off0000c29e.bin
7720649c0d5d56870f0a5525e56df5dce8287650eaefcb02df368e15e6324848
pdf-font-stream PDF embedded font (sfnt) at offset 0xC29E 10624 bytes