Malicious PDF — malware analysis report

Static analysis result for SHA-256 27c66d83361c6d13…

MALICIOUS

PDF

40.5 KB Created: 2020-08-17 00:43:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6a162dfe99d98981701f0591b3c4ac57 SHA-1: 3a8b4baf32a67a73685500c3e0ddbce5582e5093 SHA-256: 27c66d83361c6d134c7b8ae28f1bca6b0e062b35e71666c93ba53bd1544a0149
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains text suggesting a lure for a 'free credit report'. The presence of a malicious redirector and the link farm indicate a likely attempt to direct users to malicious content or phishing pages. No scripts were extracted, limiting the analysis of direct payload execution.

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.ru/pify?keyword=full+credit+report+free+uk
    • http://bavure.londonpaintparty.com/uploads/1/3/1/1/131164250/b0d71196.pdf
    • http://files.greenleafcentral.com/uploads/1/3/0/7/130739918/7938853.pdf
    • http://files.soudersthirdgrade.com/uploads/1/3/1/8/131856602/5ec6a7e4e88c5.pdf
    • http://files.senoradaniels.com/uploads/1/3/0/7/130776720/purafevol_sidejileluxaf_tanox_sivug.pdf
    • http://files.hrshootersguide.com/uploads/1/3/0/7/130738752/libilarajuroxotad.pdf
    • https://cdn.shopify.com/s/files/1/0440/6624/2710/files/how_to_hack_idle_class.pdf
    • https://cdn.shopify.com/s/files/1/0432/3776/9384/files/fcc_element_3_study_guide.pdf
    • https://cdn.shopify.com/s/files/1/0430/6649/1042/files/didimebire.pdf
    • https://cdn.shopify.com/s/files/1/0435/4303/6053/files/hp_elitebook_8470p_manual.pdf
    • https://cdn.shopify.com/s/files/1/0433/6844/8151/files/how_to_download_orespawn.pdf
    • https://cdn.shopify.com/s/files/1/0429/5219/6249/files/voxek.pdf
    • https://cdn.shopify.com/s/files/1/0431/2216/3876/files/37472958969.pdf
    • https://cdn.shopify.com/s/files/1/0433/0048/7332/files/kapubukinisadukikor.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xuvoba.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_off0000629c.bin
664c36005aa73c97297226aca8163ee24fafe3c2a145452a202d6423536294c7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x629C 4780 bytes
font_01_sfnt_off000072ec.bin
b3731c8f02128fa8cb82f0a8cbba2789323383cb3f3e6f2892d800bfca1d21e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72EC 10128 bytes

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