Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ae2ae1a33d7f9d5…

MALICIOUS

PDF

44.9 KB Created: 2020-07-27 20:51:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 922db94c1917c625a7712f4153d1a1a8 SHA-1: 783cebcc83fb344f804b5a791ebb414aefe80cf8 SHA-256: 1ae2ae1a33d7f9d574f8446b36b3edc8bfc9ccb5da0fe51a9631fc4927591398
120 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.com'. Additionally, it exhibits a PDF link farm heuristic, with numerous external links, many hosted on Shopify. The document body is heavily obfuscated but contains references to 'wkhtmltopdf' and a date, suggesting it was generated programmatically. The primary attack pattern involves directing users to malicious infrastructure via these 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/pify?keyword=buy+cartoon+double+bedsheet
    • http://files.merrystreet.com/uploads/1/3/1/3/131382680/7347141.pdf
    • http://files.miscellaneous-music.com/uploads/1/3/1/3/131398358/bbf5099e.pdf
    • http://files.singersandactorsworkshop.com/uploads/1/3/2/7/132740218/mubazaxumadajag.pdf
    • http://files.epistemy.eu/uploads/1/3/1/0/131070527/3955963.pdf
    • http://files.oilymantra.com/uploads/1/3/2/6/132695212/vifamefi.pdf
    • https://cdn.shopify.com/s/files/1/0435/6295/9006/files/53825418279.pdf
    • https://cdn.shopify.com/s/files/1/0432/4874/6651/files/daxotitoxo.pdf
    • https://cdn.shopify.com/s/files/1/0433/4102/1334/files/30400511012.pdf
    • https://cdn.shopify.com/s/files/1/0437/9102/4280/files/morevaf.pdf
    • https://cdn.shopify.com/s/files/1/0433/6176/3480/files/xetixudirijobuva.pdf
    • https://cdn.shopify.com/s/files/1/0437/9289/2053/files/nemuz.pdf
    • https://cdn.shopify.com/s/files/1/0435/9972/4702/files/10632914285.pdf
    • https://cdn.shopify.com/s/files/1/0428/9291/8937/files/48520691741.pdf
    • https://cdn.shopify.com/s/files/1/0431/5496/4637/files/84517300681.pdf
    • https://cdn.shopify.com/s/files/1/0432/7319/1588/files/guganebugonagejivenogaper.pdf
    • https://cdn.shopify.com/s/files/1/0432/3957/1616/files/nerivaraxudexiwinulesof.pdf
    • https://cdn.shopify.com/s/files/1/0433/1434/8197/files/95657888303.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/
    • https://cdn.shopify.com/s/files/1/0433/4102/1334/fi

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000074f5.bin
b965755006007906a40d5dfb03f819d18a4011dcb14069cb3a14cb175e8b1c19		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74F5 5152 bytes
font_01_sfnt_off00008667.bin
879ff684f65f03c318e99693f1e714854dca4b8e85c88daf0eb331b0444b0f13		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8667 9536 bytes

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