Malicious PDF — malware analysis report

Static analysis result for SHA-256 c79f5b13000e2dcf…

MALICIOUS

PDF

42.1 KB Created: 2020-08-15 19:28:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: eca02ec13dcab0a9915768d7b244b500 SHA-1: 793eec02c1173113d7cc07f9716d3d05c3484600 SHA-256: c79f5b13000e2dcf88ce787e2966a09f3e9418ee006dc4b26d02ca6513c3d2d7
130 Risk Score

Malware Insights

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

The PDF file contains a link that redirects to a known malicious domain, ttraff.com. This is further supported by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains the same URL and appears to be a lure for downloading a PDF. The PDF_SEO_LINK_FARM heuristic indicates a large number of links to other PDFs, likely for SEO manipulation or to host further malicious content.

Heuristics 4

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/wb?keyword=bass%20guitar%20rhythm%20exercises%20pdf
    • http://files.jillwarnearts.com/uploads/1/3/1/8/131871535/89d07fc56d4c.pdf
    • http://files.theeagleempire.net/uploads/1/3/0/8/130813757/1956671.pdf
    • http://kugasulan.impulsivelust.com/uploads/1/3/0/8/130814328/tigelizamil-munix-widarebed.pdf
    • http://files.mrfernandoferrer.com/uploads/1/3/0/8/130814636/3d82754e67.pdf
    • http://sixafavi.goldengoosefilmsinc.com/uploads/1/3/0/7/130775918/kutixu.pdf
    • https://cdn.shopify.com/s/files/1/0433/4760/7720/files/lodatenamalorejekob.pdf
    • https://cdn.shopify.com/s/files/1/0428/6038/0327/files/71231444908.pdf
    • https://cdn.shopify.com/s/files/1/0437/3898/8709/files/panodewajozanizevuxe.pdf
    • https://cdn.shopify.com/s/files/1/0427/7898/4614/files/dijanajolevunu.pdf
    • https://cdn.shopify.com/s/files/1/0430/7140/6234/files/65340386178.pdf
    • https://cdn.shopify.com/s/files/1/0432/9812/8036/files/49794796032.pdf
    • https://cdn.shopify.com/s/files/1/0432/2977/3982/files/387695792.pdf
    • https://cdn.shopify.com/s/files/1/0434/4456/8220/files/biblia_de_estudio_del_diario_vivir.pdf
    • https://cdn.shopify.com/s/files/1/0431/5047/5413/files/adenosina_farmacocinetica_y_farmacodinamia.pdf
    • https://cdn.shopify.com/s/files/1/0438/6009/9222/files/xutuvubaxiwuwujo.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_off000064f4.bin
4b6e86ded103b11606d7047f23822b8592b9fee787dd4d85080d0a4e4f324907
pdf-font-stream PDF embedded font (sfnt) at offset 0x64F4 5756 bytes
font_01_sfnt_off00007874.bin
ad9a3a66ded6c4f763c1937107a9d4f6e6339cab20d5b0f8d91a67d6641c123b
pdf-font-stream PDF embedded font (sfnt) at offset 0x7874 10352 bytes