Malicious PDF — malware analysis report

Static analysis result for SHA-256 a00446a4bb766f47…

MALICIOUS

PDF

41.6 KB Created: 2020-08-15 04:21:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 25ba0690b6574477222d86b67349e458 SHA-1: 9fce403d06aa4b344f149a2044c26229351ed480 SHA-256: a00446a4bb766f479a895b6333e5e1f32ef49b9465419ba336149993d595ecc4
130 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.cc'. This URL is presented within the document body, disguised as a 'Barclays business plan template'. The file also exhibits a PDF link farm heuristic, indicating a large number of outbound links, many of which point to Shopify domains hosting other PDFs. The presence of a visual download button lure further supports a social engineering attack. The primary malicious IOC is the redirector URL.

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.cc/pify?keyword=barclays+business+plan+templates
    • http://files.ikargb.co.uk/uploads/1/3/1/4/131409170/c416f2d8c877.pdf
    • http://woluwonav.actionrating.com/uploads/1/3/0/8/130874435/jumaberosamive-tujedazelek-lamanadixuzim.pdf
    • http://files.learningforlittlepeoplepreschool.com/uploads/1/3/1/4/131438456/57ea1e3d3c.pdf
    • https://cdn.shopify.com/s/files/1/0433/5907/6502/files/mewuxekujimokejosazov.pdf
    • https://cdn.shopify.com/s/files/1/0430/8385/8073/files/10917070394.pdf
    • https://cdn.shopify.com/s/files/1/0430/4191/5042/files/71167124019.pdf
    • https://cdn.shopify.com/s/files/1/0440/7135/4533/files/83307897861.pdf
    • https://cdn.shopify.com/s/files/1/0431/6086/2874/files/bathing_soap_making.pdf
    • https://cdn.shopify.com/s/files/1/0428/4314/4355/files/31758100405.pdf
    • https://cdn.shopify.com/s/files/1/0436/3167/3502/files/luvekabemexaj.pdf
    • https://cdn.shopify.com/s/files/1/0436/9724/2280/files/87809645594.pdf
    • https://cdn.shopify.com/s/files/1/0430/9726/0192/files/19536949898.pdf
    • https://cdn.shopify.com/s/files/1/0451/4159/0170/files/goromuge.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zavokalozetaxolemo.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_off000064d0.bin
a38362af21e4ad1a0a485909efc4528d285cdac813cbb88829421c8e4bc488d9
pdf-font-stream PDF embedded font (sfnt) at offset 0x64D0 5368 bytes
font_01_sfnt_off000076fb.bin
d4849ee311df19111eed27efc5ea4cc5255d735a43ec6333352a7d71c12d0090
pdf-font-stream PDF embedded font (sfnt) at offset 0x76FB 10112 bytes