Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7284b7e07f8be06…

MALICIOUS

PDF

43.2 KB Created: 2020-08-06 20:56:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 58259eeb6bb26da9898c753ae87524bb SHA-1: c3119e831f5152b6ab02e3af7b16822bbf881e91 SHA-256: c7284b7e07f8be061059c9d7d0f43acc55199c07fae2da18c5574e7543e0df8d
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF file contains a large number of embedded links, many of which point to Shopify domains hosting other PDF files, suggesting a link farm for SEO manipulation or traffic redirection. One critical heuristic firing indicates a direct link to a known malicious redirector at 'https://ttraff.ru/pify?keyword=bilirrubina+total+valores+normales+pdf'. This redirector is likely used to obscure the final malicious destination. The document body itself is heavily obfuscated but contains the same URLs found in the heuristics, reinforcing the malicious intent.

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=bilirrubina+total+valores+normales+pdf
    • http://files.hisinscriptions.com/uploads/1/3/0/7/130740066/ca085ca6.pdf
    • http://files.pnowebgap.com/uploads/1/3/2/8/132814343/1062643.pdf
    • http://xuguratu.martoncumgraftonhistory.com/uploads/1/3/1/8/131856743/lagin.pdf
    • http://files.lorraineeljuga.com/uploads/1/3/1/8/131860787/f217d2b0.pdf
    • https://cdn.shopify.com/s/files/1/0431/1980/4578/files/waxewevuxukadog.pdf
    • https://cdn.shopify.com/s/files/1/0435/6295/8997/files/nofapugunejo.pdf
    • https://cdn.shopify.com/s/files/1/0434/7704/1304/files/73978197716.pdf
    • https://cdn.shopify.com/s/files/1/0433/9266/3702/files/tonodurosixeki.pdf
    • https://cdn.shopify.com/s/files/1/0427/3173/3159/files/wixonozisu.pdf
    • https://cdn.shopify.com/s/files/1/0431/9048/5150/files/cell_phone_history.pdf
    • https://cdn.shopify.com/s/files/1/0434/7399/3890/files/69334111715.pdf
    • https://cdn.shopify.com/s/files/1/0434/5207/2088/files/nirolurozutimetuji.pdf
    • https://cdn.shopify.com/s/files/1/0441/3331/8808/files/anti_inflammatory_drugs_list.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_off00006780.bin
2b76e0656f83310a37395836deb7846a6a3fae04606b950a4f69fc59edc3dbdd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6780 5436 bytes
font_01_sfnt_off000079ea.bin
49d6cd23365bf5694f9da5dd2a04fdf1893681f41b2fc93d9333947456ece7bd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x79EA 11056 bytes

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