Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2dc98ac3fefe9ba…

MALICIOUS

PDF

41.4 KB Created: 2020-08-07 21:26:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 943d8848242dbad217c364e1c208bbf4 SHA-1: a34bea53d05c61a7fb3b008e50844b305992efb9 SHA-256: d2dc98ac3fefe9bac3eb3c247c03e82b7518782465ed0c0c5d6d8239e849b4b3
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a large number of embedded links, many of which point to external resources. One critical heuristic firing indicates a malicious redirector link, specifically 'https://ttraff.ru/pify?keyword=modelo+biopsicosocial+definicion+pdf', which is likely used to funnel victims to malicious sites. The document body, though heavily obfuscated, contains references to 'wkhtmltopdf' and a date, suggesting it was generated programmatically. The presence of numerous Shopify-hosted PDF links, while many are benign, contributes to a link farm tactic. 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=modelo+biopsicosocial+definicion+pdf
    • http://files.creativesimone.com/uploads/1/3/1/8/131858045/9256059.pdf
    • http://files.ravensrelics.com/uploads/1/3/1/3/131398547/kedadubowegikiz.pdf
    • http://files.miniaturesbygarcia.com/uploads/1/3/1/6/131636914/818241.pdf
    • https://cdn.shopify.com/s/files/1/0434/1330/7541/files/21415596646.pdf
    • https://cdn.shopify.com/s/files/1/0437/6697/2577/files/zipopijunapoviruxoxek.pdf
    • https://cdn.shopify.com/s/files/1/0432/0726/2367/files/farepojigefikovixowa.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/65028435792.pdf
    • https://cdn.shopify.com/s/files/1/0432/7338/8190/files/16771887446.pdf
    • https://cdn.shopify.com/s/files/1/0444/4828/4839/files/change_file_size_free.pdf
    • https://cdn.shopify.com/s/files/1/0431/6397/5835/files/kotor_2_restored_content_mod.pdf
    • https://cdn.shopify.com/s/files/1/0431/0522/2818/files/mujekume.pdf
    • https://cdn.shopify.com/s/files/1/0432/8371/0117/files/kunafasadosizerowojepemo.pdf
    • https://cdn.shopify.com/s/files/1/0437/1392/1175/files/72689170090.pdf
    • https://cdn.shopify.com/s/files/1/0428/2990/6079/files/82640841148.pdf
    • https://cdn.shopify.com/s/files/1/0435/2465/3224/files/332086006.pdf
    • https://cdn.shopify.com/s/files/1/0430/1642/1529/files/3195384275.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_off000065cf.bin
a71bd43038de1e1cb8b6335ac53c8b56b61e26b683142f4bc7c3ce796e7315b9
pdf-font-stream PDF embedded font (sfnt) at offset 0x65CF 5200 bytes
font_01_sfnt_off0000779b.bin
b9c1a56f486c7af682d8951823b50873c13211930480affd3caf0a7f3ba18b40
pdf-font-stream PDF embedded font (sfnt) at offset 0x779B 9764 bytes