Malicious PDF — malware analysis report

Static analysis result for SHA-256 973c97077716fbef…

MALICIOUS

PDF

48.8 KB Created: 2020-08-23 17:28:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 76b573be752f0c20e572a9755b654c4f SHA-1: 1f01b8bc42f1086a058f34b1208e737d7e89de53 SHA-256: 973c97077716fbefe46e3fc80c34ed1bb6264dafbe2e0e6d2bd5ddd418bdafcd
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to suspicious domains. One critical heuristic identified a link to a known malicious redirector, ttraff.ru, which is likely used to obscure the final malicious destination. The document body, though heavily obfuscated, contains the same URL, suggesting it is the primary lure. The presence of numerous links to Shopify domains, some confirmed benign and others unknown, indicates a potential attempt to blend malicious links with legitimate-looking ones.

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=article+writing+format+cbse+class+9
    • http://zuxilinex.devizesfinekitchenswiltshire.co.uk/uploads/1/3/1/1/131164048/f2b2db31b29.pdf
    • http://files.shepherdscott.com/uploads/1/3/2/6/132695325/wegegekukozir.pdf
    • http://pewub.thewondermart.shop/uploads/1/3/0/9/130969192/8761772.pdf
    • https://cdn.shopify.com/s/files/1/0434/5220/3161/files/44118893606.pdf
    • https://cdn.shopify.com/s/files/1/0429/9482/7418/files/48051276156.pdf
    • https://cdn.shopify.com/s/files/1/0429/2250/8454/files/new_heinemann_maths_3_answer_book.pdf
    • https://cdn.shopify.com/s/files/1/0435/7062/6723/files/36883522707.pdf
    • https://cdn.shopify.com/s/files/1/0434/1982/8386/files/95574599048.pdf
    • https://cdn.shopify.com/s/files/1/0434/2661/1357/files/bimatoprosta_bula.pdf
    • https://cdn.shopify.com/s/files/1/0431/6410/6908/files/53383253308.pdf
    • https://cdn.shopify.com/s/files/1/0428/5225/3863/files/bomulixigin.pdf
    • https://cdn.shopify.com/s/files/1/0431/8475/0743/files/35253821168.pdf
    • https://cdn.shopify.com/s/files/1/0429/4977/1430/files/71358046580.pdf
    • https://cdn.shopify.com/s/files/1/0437/8561/7570/files/rukomugipejolufogunutod.pdf
    • https://cdn.shopify.com/s/files/1/0439/1701/7243/files/80319671193.pdf
    • https://cdn.shopify.com/s/files/1/0434/2143/4005/files/today_weather_report_in_my_area.pdf
    • https://cdn.shopify.com/s/files/1/0464/7210/2056/files/buscar_una_imagen_google_android.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_off000080a3.bin
426fb5f124df599bc203d75323f834a2fe39b10c5a4ee5ff9e6e9cab1552d476
pdf-font-stream PDF embedded font (sfnt) at offset 0x80A3 5576 bytes
font_01_sfnt_off0000938e.bin
3083d976a7b011af85d6b4be30d715c2fb5d9d82826fd459b4503c1f4e7a78fc
pdf-font-stream PDF embedded font (sfnt) at offset 0x938E 10136 bytes