Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb680fbd62aa7847…

MALICIOUS

PDF

46.1 KB Created: 2020-07-09 13:13:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 834a369de61eafa6f88db03982433d0a SHA-1: cb2ea67149c0ec7357a95cbef7067b48796b52bc SHA-256: cb680fbd62aa78477d7ec86d361dc9502d65bdbab31e3d45372b311535796865
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external PDF files hosted on various domains. One critical heuristic firing indicates a malicious redirector link to 'ttraff.com', suggesting a phishing or SEO spam campaign. The document body, though obfuscated, contains text related to 'Sistema administrativo definicion pdf' and references the wkhtmltopdf tool, indicating it was likely generated programmatically to appear as a legitimate document while hosting numerous malicious links.

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/wb?keyword=sistema%20administrativo%20definicion%20pdf
    • http://files.tynksgemstonedesigns.com/uploads/1/3/2/7/132740415/7381d2f1749d4.pdf
    • http://files.mylunarsign.com/uploads/1/3/1/8/131857482/6fcae3.pdf
    • http://files.galleypower.com/uploads/1/3/0/7/130739764/224409.pdf
    • http://files.ebresearch.org/uploads/1/3/0/8/130874411/miziluzivujogujuji.pdf
    • http://files.hsc3knives.com/uploads/1/3/0/9/130969243/a00465f049b.pdf
    • http://files.princessmi.com/uploads/1/3/0/8/130873975/xejuxikukutuxitemewi.pdf
    • http://files.nnhst2.org/uploads/1/3/1/3/131379612/lufuxofuwusuwufaposi.pdf
    • http://files.electaylin.com/uploads/1/3/2/7/132740320/8322645.pdf
    • http://files.soapbarlounge.com/uploads/1/3/0/7/130776718/luriza_bokitewakikizu_sepipe.pdf
    • http://files.redesignforwholefamilies.com/uploads/1/3/1/8/131857193/jowudakavesof-rusodisoton-zofokizubolas.pdf
    • https://wiwokovof.files.wordpress.com/2020/06/44669798741.pdf
    • https://netupobupu.files.wordpress.com/2020/06/torubosifirejulej.pdf
    • https://sifodupaw191158614.files.wordpress.com/2020/06/kegakizer.pdf
    • https://felusigasixi.files.wordpress.com/2020/06/ruluralivarudagidasirif.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/58933331969.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/94430640368.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/44411244229.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/rodol.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/tevedizulav.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/27392185694.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_off000075fe.bin
1ba155f07da8f928aa829be8a4677b3d58f88fc8c548d2f24f4b69fbf2b4a346
pdf-font-stream PDF embedded font (sfnt) at offset 0x75FE 5220 bytes
font_01_sfnt_off0000879f.bin
3910deb7b3899fd32df9d3fc1e18fab5fe6b3377d31fcac29953664fccc828ba
pdf-font-stream PDF embedded font (sfnt) at offset 0x879F 10552 bytes