Malicious PDF — malware analysis report

Static analysis result for SHA-256 b8587824a9e79415…

MALICIOUS

PDF

43.5 KB Created: 2020-08-08 03:37:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 51a6ded90e5a47786faabd23c76a422c SHA-1: 8dc2689c427a352f7d79049acbb9d5a29d55d3df SHA-256: b8587824a9e79415c0022847617e1fb56ac1dbd53db0f23689fbf460d188f693
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, specifically pointing to 'https://ttraff.ru/pify?keyword=cute+halloween+coloring+pages+pdf'. This URL is presented within the document body, disguised as a link to Halloween coloring pages, likely as a lure. The PDF also contains a mass external PDF link farm, with many links pointing to Shopify domains, but the primary malicious indicator is the redirector. No scripts were extracted, and the document body was heavily obfuscated.

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=cute+halloween+coloring+pages+pdf
    • http://files.emilyreynoldsart.com/uploads/1/3/0/8/130814129/6097447.pdf
    • http://files.bioscienceessentials2brn.com/uploads/1/3/1/1/131163684/fitegog_sazudu_wexefaxuzemib_nesasaketa.pdf
    • http://files.invernesssouth.com/uploads/1/3/0/7/130776206/a99813e94636b6.pdf
    • https://cdn.shopify.com/s/files/1/0434/5770/8193/files/1639437133.pdf
    • https://cdn.shopify.com/s/files/1/0429/8211/3433/files/15862575271.pdf
    • https://cdn.shopify.com/s/files/1/0434/0957/1990/files/35863974845.pdf
    • https://cdn.shopify.com/s/files/1/0431/1829/7245/files/wixovoporebob.pdf
    • https://cdn.shopify.com/s/files/1/0433/2155/7150/files/84987930678.pdf
    • https://cdn.shopify.com/s/files/1/0435/0499/2408/files/75945238896.pdf
    • https://cdn.shopify.com/s/files/1/0437/3974/2359/files/87874588845.pdf
    • https://cdn.shopify.com/s/files/1/0432/8059/7152/files/wabidasuresabumopumowalu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0808/9509/files/liripuka.pdf
    • https://cdn.shopify.com/s/files/1/0433/3237/0584/files/lilerojejuw.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_off00006c4b.bin
58abb206a917a87d65dc66e8fab728d7897872f22468ce40ed11784ceff45293		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C4B 5416 bytes
font_01_sfnt_off00007ebf.bin
9846ffef5bc7f420aba408a9574d66e6ef99e39539059610b4a9258bb112d3c3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7EBF 10236 bytes

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