Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6b806423e3f3813…

MALICIOUS

PDF

42.0 KB Created: 2020-08-29 05:23:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 516d41882de8c66df9c7eedbf4317df9 SHA-1: 5b2c37b8cfd4a019f9bda9e65609fe2a98167c0c SHA-256: e6b806423e3f381320a7f4d48adb24a0878385d8092092ffe76b04172ca366e4
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, pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains text related to a medical manual download and the same malicious URL. The PDF also exhibits characteristics of a link farm, with numerous embedded links to external PDFs, likely for SEO manipulation to increase visibility of malicious 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.com/wix?keyword=washington+manual+of+outpatient+internal+medicine+pdf+download
    • https://static.usrfiles.com/ugd/b8c837_22419d5e27a1413a9806da59d1aaeb76.pdf
    • https://static.usrfiles.com/ugd/b8c837_ef698924a61c4b1e9fa3640e73b71dec.pdf
    • https://static.usrfiles.com/ugd/b8c837_c4e7399ef10f49729aac82d6bcbcfe2c.pdf
    • https://static.usrfiles.com/ugd/b8c837_79d62f8333df476db4b78d181843641c.pdf
    • https://cdn.shopify.com/s/files/1/0431/4578/9600/files/juxokuzax.pdf
    • https://cdn.shopify.com/s/files/1/0435/7767/1843/files/guide_vert_michelin_france.pdf
    • https://cdn.shopify.com/s/files/1/0432/9350/7737/files/jisolasenigiwamaw.pdf
    • https://cdn.shopify.com/s/files/1/0430/6976/7842/files/datiwesonipulepapes.pdf
    • https://cdn.shopify.com/s/files/1/0430/5004/1495/files/dejera.pdf
    • https://cdn.shopify.com/s/files/1/0431/2737/3986/files/69316220119.pdf
    • https://static.usrfiles.com/ugd/b8c837_44b688098da540dca333d2bb75b5df94.pdf
    • https://static.usrfiles.com/ugd/b8c837_db44d48b000148709a23b730c690a1e0.pdf
    • https://static.usrfiles.com/ugd/b8c837_9b7b9ce27087422684b7c5d418b1492a.pdf
    • https://static.usrfiles.com/ugd/b8c837_c53a84151ae34208987a1b55759b6a9b.pdf
    • https://static.usrfiles.com/ugd/b8c837_93df851ba33a428ba21dde46959a3e73.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_off000063f3.bin
143f58e449244361e93227dda392bd8095e4143e30916da5333a455327249514		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63F3 5676 bytes
font_01_sfnt_off00007723.bin
a7c5fe32c3ca1c735bb225d2cce10e17ac17a01db8a52d4c340903a8b93155c8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7723 10236 bytes

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