Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5e75b514da435f3…

MALICIOUS

PDF

41.9 KB Created: 2020-08-31 07:21:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3c8c33dece077fcbf69aa7fa1a1486ef SHA-1: 0f94e1b0eccba410a4129438ab0ad50f5e0d207f SHA-256: c5e75b514da435f3cd0de3ea928c4c106a23cb6be2e4049ecf70543340e61972
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 SEO-optimized PDF files hosted on Shopify and static.usrfiles.com. One critical heuristic identified a link to a known malicious redirector infrastructure at 'https://ttraff.me/wix?keyword=app+presentation+after+effects+templ'. This suggests the document is designed to funnel users through a series of links, ultimately leading to malicious content. 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.me/wix?keyword=app+presentation+after+effects+templ
    • https://cdn.shopify.com/s/files/1/0439/8468/3166/files/etiology_definition.pdf
    • https://cdn.shopify.com/s/files/1/0436/0683/5358/files/89615150122.pdf
    • https://cdn.shopify.com/s/files/1/0434/3886/6584/files/zixexifokikelisoxapanewa.pdf
    • https://cdn.shopify.com/s/files/1/0427/7141/5196/files/citoneurin_comprimido_bula.pdf
    • https://cdn.shopify.com/s/files/1/0431/0866/3462/files/bases_de_datos_nosql.pdf
    • https://static.usrfiles.com/ugd/b8c837_c1c1b08528504a6386fbecff564c815f.pdf
    • https://static.usrfiles.com/ugd/3aca14_1109b304b82c45cf86aa7c76fbff8fb8.pdf
    • https://static.usrfiles.com/ugd/b8c837_f3ff1f96ac4e4a24bc5ccdc4a0ac3321.pdf
    • https://static.usrfiles.com/ugd/b8c837_6c56ff02bb8747a39c6d409075c3bdb5.pdf
    • https://static.usrfiles.com/ugd/b8c837_685f752c2e35491fab12d5c193624096.pdf
    • https://static.usrfiles.com/ugd/36f25b_71dce12f15114b6690505bc51e4b3bbb.pdf
    • https://static.usrfiles.com/ugd/61f964_ced1445e6fe8403da89678305d7be121.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000052a8.bin
8fb1ac4740beb7704efed93919891a2067057dc293379bac2618934f4a8ff186
pdf-font-stream PDF embedded font (sfnt) at offset 0x52A8 4940 bytes
font_01_sfnt_off00006348.bin
958cae5417114dea72189aa13236b73d687f7068669da46a5ce3f65f055cb19c
pdf-font-stream PDF embedded font (sfnt) at offset 0x6348 12908 bytes
font_02_sfnt_off00008c9f.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3
pdf-font-stream PDF embedded font (sfnt) at offset 0x8C9F 4324 bytes