Malicious PDF — malware analysis report

Static analysis result for SHA-256 79af0e077253c116…

MALICIOUS

PDF

41.2 KB Created: 2020-08-31 23:18:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 837d30775779879927bb8a3045b82819 SHA-1: ab4b263c328d727468d0ae718a282a9f62c4d600 SHA-256: 79af0e077253c116dd7d5512179d03284e2827393728708c19e2ced3f75a3030
120 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, identified as a link farm. One of these links, 'https://ttraff.cc/pify?keyword=deductive+method+of+research+pdf', points to a known malicious redirector. The document body, though heavily obfuscated, appears to contain text related to research papers and the wkhtmltopdf tool, suggesting a lure to entice users to click the malicious link. The primary function appears to be redirecting users to potentially harmful content.

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.cc/pify?keyword=deductive+method+of+research+pdf
    • https://static.usrfiles.com/ugd/b8c837_15b571ccc55447868505cbab9e834b35.pdf
    • https://static.usrfiles.com/ugd/55f640_4cc5415236f74bf790b00eff27fb7e42.pdf
    • https://static.usrfiles.com/ugd/cb5dea_a753082923214473a6f168122e862216.pdf
    • https://static.usrfiles.com/ugd/eed56f_4c81b83e94274636b810f527958d5fde.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tiwimuz.pdf
    • https://cdn.shopify.com/s/files/1/0432/7309/3288/files/51501758416.pdf
    • https://cdn.shopify.com/s/files/1/0435/6145/1681/files/dakilivazizolokidituriz.pdf
    • https://cdn.shopify.com/s/files/1/0431/3455/0177/files/52377351693.pdf
    • https://static.usrfiles.com/ugd/b8c837_87d00bb687ca4e67b4ae52a38c2d35ef.pdf
    • https://static.usrfiles.com/ugd/daca0d_9556cd498ee14123b88f47e05cd91cf8.pdf
    • https://static.usrfiles.com/ugd/384ea4_d3b7c344884540c9ace8b298fbe84968.pdf
    • https://static.usrfiles.com/ugd/e8506d_39675647eb4f4a0297ab0c3d5971e0f0.pdf
    • https://static.usrfiles.com/ugd/ca32a8_801f12c919074411a655599befd4bd37.pdf
    • https://static.usrfiles.com/ugd/c7ef1a_3541425e35ed46a58afaddb8cbc437ff.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_off000062ca.bin
70b53eac8f26ed05925fcb49c572484aab08c3a5921ceac1812112fc8e6c5ebc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x62CA 5424 bytes
font_01_sfnt_off00007521.bin
9790b01f22ceae0eb72742bf64ff258d0708bc5ee9c919bcf38b35ccc93d92af		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7521 10284 bytes

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