Malicious PDF — malware analysis report

Static analysis result for SHA-256 f9f8f528f59e594b…

MALICIOUS

PDF

41.3 KB Created: 2020-08-05 06:19:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5aceb73c53c31f1b7097388280c56000 SHA-1: 3f7ee1c04fce0d107cef73001b31171a0858854d SHA-256: f9f8f528f59e594b91958158fadc91558c373780ef4906322e2f2142fbf115f9
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to ttraff.ru. This indicates the document is designed to redirect users to malicious infrastructure. Additionally, the PDF exhibits characteristics of a link farm, embedding numerous external links, many of which point to Shopify-hosted PDFs. The primary malicious link is https://ttraff.ru/pify?keyword=assembly+language+programming+made+clear+a+systematic+approach+pdf, which is likely part of a phishing or malware distribution scheme.

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=assembly+language+programming+made+clear+a+systematic+approach+pdf
    • http://files.i2cafe.com/uploads/1/3/0/9/130969580/japobejezisuj.pdf
    • http://files.inneriversom.com/uploads/1/3/2/7/132740525/154488.pdf
    • http://files.pumpingthecure.ca/uploads/1/3/1/8/131857914/d60231a121943c.pdf
    • https://cdn.shopify.com/s/files/1/0429/8565/2375/files/vipozisafuvewaj.pdf
    • https://cdn.shopify.com/s/files/1/0432/2826/6654/files/9949318598.pdf
    • https://cdn.shopify.com/s/files/1/0428/4294/7751/files/que_es_un_estudio_de_mercado_libros.pdf
    • https://cdn.shopify.com/s/files/1/0427/6027/4087/files/ziduzaxugajikadaranewu.pdf
    • https://cdn.shopify.com/s/files/1/0431/1249/7312/files/bufezagige.pdf
    • https://cdn.shopify.com/s/files/1/0439/5086/6590/files/48312925484.pdf
    • https://cdn.shopify.com/s/files/1/0434/4017/7314/files/lefabosafas.pdf
    • https://cdn.shopify.com/s/files/1/0433/2912/6550/files/desawedijo.pdf
    • https://cdn.shopify.com/s/files/1/0430/0007/0307/files/bujupomava.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_off0000617c.bin
aec39800a56f35d8298aaa7a4883055325f205e3eabad55bbd7c8cc6b58c0327		 pdf-font-stream PDF embedded font (sfnt) at offset 0x617C 5800 bytes
font_01_sfnt_off00007518.bin
d35c6d92c78942b91813f42336f3759d5a1e2d7a87ee1c29fa0e07bf3f0150e4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7518 10240 bytes

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