Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6b8ac17f5445e6e…

MALICIOUS

PDF

42.5 KB Created: 2020-08-13 01:55:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5fac1c39da6c6a1ea4cccfad960b23ee SHA-1: 83b21890858d63d136f535def95a848d4049552a SHA-256: c6b8ac17f5445e6eb1fbb9cad6799631354843f53d85704d18af4fb631bf9d26
120 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/pify?keyword=positive+effects+of+bullying+pdf'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded links, many of which point to Shopify domains hosting PDF files. The document body, though heavily obfuscated, contains the same malicious URL. This suggests the document's primary purpose is to redirect users to malicious infrastructure.

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=positive+effects+of+bullying+pdf
    • http://files.mjlphd.net/uploads/1/3/0/7/130739070/meluvefosiwen.pdf
    • http://files.markeatongardencentre.com/uploads/1/3/0/7/130739253/vetipipadox-vixitabutiro-nukosin-tekekunekiw.pdf
    • http://vififim.lacaa.com/uploads/1/3/1/0/131069934/3994600.pdf
    • https://cdn.shopify.com/s/files/1/0427/6197/8023/files/java_eclipse_gui_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0436/9501/4056/files/4181239284.pdf
    • https://cdn.shopify.com/s/files/1/0429/9672/7962/files/jijomikomefodewu.pdf
    • https://cdn.shopify.com/s/files/1/0434/0131/4456/files/81888392617.pdf
    • https://cdn.shopify.com/s/files/1/0429/9862/8501/files/kazabix.pdf
    • https://cdn.shopify.com/s/files/1/0432/7571/4715/files/samsung_washing_machine_repair_manual.pdf
    • https://cdn.shopify.com/s/files/1/0432/0896/6307/files/juwogope.pdf
    • https://cdn.shopify.com/s/files/1/0431/9005/9176/files/oxford_phonics_world_3_workbook_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/3175/6957/files/mipabaxumojitokapolep.pdf
    • https://cdn.shopify.com/s/files/1/0433/2178/6521/files/kobumixulezapa.pdf
    • https://cdn.shopify.com/s/files/1/0438/8965/5960/files/vufebasunasowataxotesezi.pdf
    • https://cdn.shopify.com/s/files/1/0428/7237/3414/files/tilotekeme.pdf
    • https://cdn.shopify.com/s/files/1/0436/2698/7680/files/51449974418.pdf
    • https://cdn.shopify.com/s/files/1/0428/2476/1507/files/wiguxobapupodijamukoxufo.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_off000067b2.bin
4461692be151867e6c87dc0f591e3d0f5871072f777cdf67e02282dc26b40e9b
pdf-font-stream PDF embedded font (sfnt) at offset 0x67B2 5320 bytes
font_01_sfnt_off000079ea.bin
7769c51c9d5f4ab148ee0c04b8aa5ec9752b5cf5d039016a8ef980f051d55ef2
pdf-font-stream PDF embedded font (sfnt) at offset 0x79EA 10244 bytes