Malicious PDF — malware analysis report

Static analysis result for SHA-256 a4de05dbc01d3e7d…

MALICIOUS

PDF

39.1 KB Created: 2020-08-01 22:41:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 66da4942245040fc618e178a3f22d71b SHA-1: 85607a743d53a1fbbce632dea097fbd1c5a5ecd7 SHA-256: a4de05dbc01d3e7d237d8abaa59b8ae926b24407d8e9d923f147dca797e43fe0
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to a link farm hosted on cdn.shopify.com. One critical heuristic firing indicates a PDF redirector link to 'ttraff.cc', which is known malicious infrastructure. The document body, though heavily obfuscated, contains text referencing 'Discord font changed' and the malicious URL, suggesting a social engineering lure to trick users into clicking the link.

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.cc/pify?keyword=discord+font+changed
    • http://files.mairibudreau.com/uploads/1/3/0/7/130776864/ziwawajobigogefivane.pdf
    • http://files.davidgloverproductions.com/uploads/1/3/0/7/130738892/varatib.pdf
    • http://files.retirementtimeline.com/uploads/1/3/1/3/131398385/d3035473.pdf
    • http://files.cicelmarketing.com/uploads/1/3/1/4/131406403/zetoterawejifig.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/46552055365.pdf
    • https://cdn.shopify.com/s/files/1/0430/4669/9165/files/daluvinalixe.pdf
    • https://cdn.shopify.com/s/files/1/0430/9581/8404/files/94673597545.pdf
    • https://cdn.shopify.com/s/files/1/0429/6628/6490/files/2347224609.pdf
    • https://cdn.shopify.com/s/files/1/0431/5011/4978/files/90039328663.pdf
    • https://cdn.shopify.com/s/files/1/0428/9350/8771/files/21562878326.pdf
    • https://cdn.shopify.com/s/files/1/0431/0433/8074/files/all-_i_vs_ipb.pdf
    • https://cdn.shopify.com/s/files/1/0432/9635/8565/files/ruxopovemuvelonidafuvurad.pdf
    • https://cdn.shopify.com/s/files/1/0434/9919/2486/files/dumosixepopiger.pdf
    • https://cdn.shopify.com/s/files/1/0427/9861/2636/files/27644330562.pdf
    • https://cdn.shopify.com/s/files/1/0433/1945/9998/files/95643405690.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_off00005ca8.bin
76d67cf4d3c81fcb3d61ea712d841cee3f54dd6b9f6d1b5a1e43b4991b33b6b5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5CA8 5252 bytes
font_01_sfnt_off00006e84.bin
d5baebed9f5279e7b56d8ea53cf4db664e544f53644f78a860b23fd9debd4d50		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E84 9748 bytes

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