Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb14aeb729fea715…

MALICIOUS

PDF

45.0 KB Created: 2020-08-29 13:16:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 68102f6f0d6c86b04fdf09b8579b00c8 SHA-1: 08763a745032690368eed879d7da7db5d393df1c SHA-256: bb14aeb729fea71558f3751643051cbb3061766e49cb37f818a991ffda1d1b30
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to a link farm designed for SEO manipulation. One prominent link, 'https://ttraff.ru/wix?keyword=livros+classicos+de+gastronomia', is identified as a malicious redirector. The document body, though heavily corrupted, appears to be a lure related to gastronomy books, intended to trick users into clicking the malicious link.

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/wix?keyword=livros+classicos+de+gastronomia
    • https://static.usrfiles.com/ugd/b8c837_d328e361117f4c2d8c092af57806388b.pdf
    • https://static.usrfiles.com/ugd/b8c837_dd7e36a9b1d546a4b3658a39909a64ec.pdf
    • https://static.usrfiles.com/ugd/b8c837_5109253166b049b291c4531faa663632.pdf
    • https://static.usrfiles.com/ugd/b8c837_2ab3e5c330154088a2f91694170c0695.pdf
    • https://static.usrfiles.com/ugd/b8c837_988c0c7e86fa4635926f388796f04f61.pdf
    • https://cdn.shopify.com/s/files/1/0436/5457/8334/files/mukukiwawowuliduvukikimok.pdf
    • https://cdn.shopify.com/s/files/1/0432/8990/3264/files/gusijiwabidutaxi.pdf
    • https://cdn.shopify.com/s/files/1/0433/8404/5719/files/65595977906.pdf
    • https://cdn.shopify.com/s/files/1/0437/5907/5477/files/69585335800.pdf
    • https://cdn.shopify.com/s/files/1/0436/9465/3595/files/84870980528.pdf
    • https://cdn.shopify.com/s/files/1/0428/8679/1334/files/91157190042.pdf
    • https://cdn.shopify.com/s/files/1/0436/2698/7680/files/mapa_metro_barcelona.pdf
    • https://cdn.shopify.com/s/files/1/0460/1407/0945/files/fapixarutimob.pdf
    • https://cdn.shopify.com/s/files/1/0438/3699/7782/files/kojivipijuvazoraxamaxaj.pdf
    • https://cdn.shopify.com/s/files/1/0433/0166/6969/files/98590031549.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/20745245188.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_off00006dc5.bin
f8643a5ece485ba3a27e6c2a3b89f515592c09408aa309a290352ebd75497c0e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6DC5 5260 bytes
font_01_sfnt_off00007f95.bin
1fe3638ffb2e6c887e04bcf7021e2814ef648bdafd508d3e9d8b687189e4c0be		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F95 12412 bytes

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