Malicious PDF — malware analysis report

Static analysis result for SHA-256 e73dbcb39979bd0f…

MALICIOUS

PDF

42.7 KB Created: 2020-08-20 03:49:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b28345634916718de3675c353c74ae93 SHA-1: b3f8e1bdf5239e5ddada4c4537bac17e0357aaf1 SHA-256: e73dbcb39979bd0f39798224558afee4d95a722938e3356aa0b27a08dd17f07c
128 Risk Score

Malware Insights

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

The PDF contains a mass of external links, many of which are hosted on Shopify, suggesting a link farm designed to appear legitimate. One critical heuristic identified a link to a known malicious redirector, ttraff.cc, which is used to obscure the final destination. The document body text and embedded links suggest a lure related to an 'admit card', likely a phishing attempt to trick users into clicking the malicious redirector URL. No scripts were extracted from this sample.

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=admit+card+ignou
    • http://zubal.noretasdecor.com/uploads/1/3/0/8/130813765/b7bceef.pdf
    • http://files.thevillageworkshop.com/uploads/1/3/2/6/132682640/bbac76a9cb78ae.pdf
    • http://files.betweentheriversgathering.com/uploads/1/3/1/8/131856664/terejuwar-zevuvowopo.pdf
    • https://cdn.shopify.com/s/files/1/0432/3164/1762/files/29902380153.pdf
    • https://cdn.shopify.com/s/files/1/0428/4832/1692/files/53847205952.pdf
    • https://cdn.shopify.com/s/files/1/0437/6556/3549/files/9034428001.pdf
    • https://cdn.shopify.com/s/files/1/0435/5306/3063/files/circle_with_transparent_background.pdf
    • https://cdn.shopify.com/s/files/1/0431/0594/3701/files/slope_intercept_to_standard_form_calculator.pdf
    • https://cdn.shopify.com/s/files/1/0437/9472/7074/files/29254074509.pdf
    • https://cdn.shopify.com/s/files/1/0437/3194/3585/files/bewojenopokuxun.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_off00006b4c.bin
b91dc81ceaa85878484b579eb737f1f313d2f77b47fed08802721101888cf7d4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B4C 5040 bytes
font_01_sfnt_off00007c4a.bin
346623c148974d4e7b04cdf9806bfd71f9c1292fe88b5a907e83e376f89ad10a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C4A 10052 bytes

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