Malicious PDF — malware analysis report

Static analysis result for SHA-256 880a89019511fb21…

MALICIOUS

PDF

36.9 KB Created: 2020-08-17 14:30:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c1a027860c7aaa5b238a16ff811e5f7a SHA-1: 990bfafe74d4d06ebdafd4a6d900b6559cd371fc SHA-256: 880a89019511fb2139c3bf93f747fb11accbb9420b70abf207776a2deeeb2286
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to Shopify domains hosting other PDFs, suggesting a link farm for SEO manipulation. One critical heuristic identified a link to a known malicious redirector at ttraff.ru, which is also present in the document body. This indicates the primary purpose is to redirect users to malicious content, likely for phishing or malware distribution.

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=reckless+love+piano+sheet+pdf
    • http://files.franklinpres.org/uploads/1/3/1/4/131453348/tafeda-fonotujafax-gomuxufaga-nilivevul.pdf
    • http://files.rhccfd.org/uploads/1/3/0/9/130969580/mogawenoxorudodijug.pdf
    • http://rixalu.ssfitnesstraining.com/uploads/1/3/0/7/130775034/devapomiw-garezewuxum-jegukopudada.pdf
    • https://cdn.shopify.com/s/files/1/0428/9724/4316/files/kapis.pdf
    • https://cdn.shopify.com/s/files/1/0434/5993/6421/files/fevado.pdf
    • https://cdn.shopify.com/s/files/1/0431/1734/6965/files/ripojazisamudenategulorev.pdf
    • https://cdn.shopify.com/s/files/1/0431/2121/3591/files/mumbai_university_admission_2019-_20_online_form.pdf
    • https://cdn.shopify.com/s/files/1/0427/9051/8940/files/batabokes.pdf
    • https://cdn.shopify.com/s/files/1/0437/6422/0055/files/68615955931.pdf
    • https://cdn.shopify.com/s/files/1/0451/3962/4090/files/jafomegelom.pdf
    • https://cdn.shopify.com/s/files/1/0440/5238/1846/files/zisaruwijur.pdf
    • https://cdn.shopify.com/s/files/1/0432/9085/3531/files/rudadebeminamebu.pdf
    • https://cdn.shopify.com/s/files/1/0432/2128/7080/files/baixar24_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/6350/9143/files/whatsapp_business_app_for_laptop.pdf
    • https://cdn.shopify.com/s/files/1/0430/1350/5185/files/how_to_disable_code_completion_in_c.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_off00005332.bin
2f649715283fc4fbd4fa24c290e0817a1dbbe13df4f730b83f7d1c85e2c95acf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5332 5280 bytes
font_01_sfnt_off00006527.bin
10ac7c03f6948424f590950aead9940b195c9fd150bf3fc4440910fdf2becb73		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6527 9820 bytes

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