Malicious PDF — malware analysis report

Static analysis result for SHA-256 c800e8b670f42169…

MALICIOUS

PDF

33.7 KB Created: 2020-08-25 06:52:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bf2aa05d57804eed3fa40aef6715e9df SHA-1: 1776c98afabacd4a466eacc5779c7ae4e6db15c9 SHA-256: c800e8b670f4216989e1efa9943b62251ec3dffeed386d27498ea0d18d8dd874
150 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.ru/pify?keyword=afro+soul+songs+free'. This URL is presented within the document body, disguised as a search result. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs, many hosted on Shopify. The ML classifier strongly supports the malicious nature of this PDF.

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=afro+soul+songs+free
    • http://files.hvcresearch.com/uploads/1/3/2/7/132710659/zobemoxesab_sikeponeku_tadusefuz.pdf
    • https://cdn.shopify.com/s/files/1/0433/1952/5531/files/30478188451.pdf
    • https://cdn.shopify.com/s/files/1/0434/3654/0056/files/50279365118.pdf
    • https://cdn.shopify.com/s/files/1/0427/9920/2467/files/gekojewifamowixuni.pdf
    • https://cdn.shopify.com/s/files/1/0429/2971/7407/files/susigowaxadejesoja.pdf
    • https://cdn.shopify.com/s/files/1/0432/6490/1270/files/goanimate_4_schools.pdf
    • https://cdn.shopify.com/s/files/1/0429/7759/1449/files/nafoduvuxanug.pdf
    • https://cdn.shopify.com/s/files/1/0430/2936/4889/files/90788965189.pdf
    • https://cdn.shopify.com/s/files/1/0434/2674/2421/files/82925924380.pdf
    • https://cdn.shopify.com/s/files/1/0434/5298/9605/files/neoliberalism_and_globalisation.pdf
    • https://cdn.shopify.com/s/files/1/0430/6678/5949/files/abordagens_pedaggicas.pdf
    • https://cdn.shopify.com/s/files/1/0439/2602/8456/files/33300910795.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/70998441087.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_off00004882.bin
fed9de9d8b9c02f13f90c9da7b20a578058fc7632278f9af6196daf728a1fb68		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4882 4712 bytes
font_01_sfnt_off0000589d.bin
a32f578a8aba5b42a2efb11eeb2fc0bd277d70a6f8b96dfde147a70b50af17f2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x589D 9944 bytes

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