Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e7fea99d0b23c38…

MALICIOUS

PDF

51.0 KB Created: 2020-07-28 19:54:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b54a05a6a3cc48a5142ff061a8038829 SHA-1: 48ab8720bc9b395e8f62ad20dec0aa5d5cf3e9ab SHA-256: 3e7fea99d0b23c38db5f895cec5d8cfd2cb3c7b9826615f413821b6dba55928c
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, with a critical heuristic firing for a malicious redirector. The primary malicious URL identified is 'https://ttraff.ru/pify?keyword=ezreal+guide+s8+mid'. The document body is heavily obfuscated, but the presence of the URL and the heuristic firings strongly suggest a malicious redirection attempt, likely for SEO poisoning or phishing.

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=ezreal+guide+s8+mid
    • http://files.freshoutofstorage.com/uploads/1/3/1/0/131069859/a2da319da97.pdf
    • http://files.valleyliberator.com/uploads/1/3/1/6/131606035/padavosagog.pdf
    • http://files.tdshappyfaces.com/uploads/1/3/1/4/131453745/vonoxekezores.pdf
    • http://files.ludlambrass.com/uploads/1/3/0/8/130874520/vamulirezisitoj.pdf
    • http://files.valleyliberator.com/uploads/1/3/1/6/13160603
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xoxolesusoziviro.pdf
    • https://cdn.shopify.com/s/files/1/0429/5049/2316/files/wumevadunu.pdf
    • https://cdn.shopify.com/s/files/1/0434/7972/8281/files/53369760936.pdf
    • https://cdn.shopify.com/s/files/1/0430/9870/1977/files/seninegipatere.pdf
    • https://cdn.shopify.com/s/files/1/0430/0419/9075/files/movodaweramakotopovabara.pdf
    • https://cdn.shopify.com/s/files/1/0430/4021/1105/files/butiwugewonokipefu.pdf
    • https://cdn.shopify.com/s/files/1/0434/5239/9773/files/towovejefexokogugo.pdf
    • https://cdn.shopify.com/s/files/1/0435/5925/6232/files/guwaxubix.pdf
    • https://cdn.shopify.com/s/files/1/0435/9186/0379/files/84389564889.pdf
    • https://cdn.shopify.com/s/files/1/0430/9997/9930/files/xisedejup.pdf
    • https://cdn.shopify.com/s/files/1/0432/0431/3247/files/58294851848.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_off00007ca0.bin
2c74941aec5cc12620e035b8f724a68712ef0d908c7beef825c36a51ba0ebe9f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7CA0 4932 bytes
font_01_sfnt_off00008d59.bin
81e6ca1db252935176f8f4de878d4a953eb076f3a2cdea0ad71997d38b13303c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8D59 16196 bytes

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