Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e0d4f925fd4b9ef…

MALICIOUS

PDF

49.4 KB Created: 2020-08-01 19:46:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 442e9e7c3d299688b04288068e1ddd73 SHA-1: 29bbf77e44ba981e5f8e061d1e439351c55ea99c SHA-256: 4e0d4f925fd4b9ef49d698e361e6ab71ab1a115727912200d127df09fa66baee
120 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with a primary URL pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the same URL and appears to be generated by wkhtmltopdf, a tool often used for SEO spam. The embedded links likely serve to drive traffic to the malicious redirector, potentially for phishing or malware distribution.

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=the+history+of+love+nicole+krauss+pdf
    • http://files.laurenandresurbanist.com/uploads/1/3/0/9/130969993/849856421eeb6a.pdf
    • http://files.blingblingcustoms.com/uploads/1/3/1/6/131637072/8bf288db.pdf
    • http://files.fairytalejourneysbykayla.com/uploads/1/3/0/8/130813134/92d767786.pdf
    • http://files.4arrowsoutdoors.com/uploads/1/3/0/8/130814672/1910526.pdf
    • https://cdn.shopify.com/s/files/1/0433/8040/8474/files/7131099301.pdf
    • https://cdn.shopify.com/s/files/1/0437/4803/2666/files/8944596220.pdf
    • https://cdn.shopify.com/s/files/1/0429/5124/5987/files/mugimotiguzodurafasuxadif.pdf
    • https://cdn.shopify.com/s/files/1/0430/9961/9492/files/84526643930.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/baludugosutagaxoreforodul.pdf
    • https://cdn.shopify.com/s/files/1/0429/2621/1238/files/67373361152.pdf
    • https://cdn.shopify.com/s/files/1/0432/8957/5588/files/2997735614.pdf
    • https://cdn.shopify.com/s/files/1/0430/1671/6437/files/47420052499.pdf
    • https://cdn.shopify.com/s/files/1/0430/6717/9162/files/68658356088.pdf
    • https://cdn.shopify.com/s/files/1/0429/9912/0033/files/33509184188.pdf
    • https://cdn.shopify.com/s/files/1/0437/7542/6722/files/19343304703.pdf
    • https://cdn.shopify.com/s/files/1/0428/1411/1903/files/bugeduna.pdf
    • https://cdn.shopify.com/s/files/1/0434/6635/8934/files/6056733497.pdf
    • https://cdn.shopify.com/s/files/1/0432/3203/4980/files/25271930579.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_off00008340.bin
01e7abe425bd5e539fc4c2626d0633cdfc71814f169d268b6f69d776c3be4a5a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8340 5420 bytes
font_01_sfnt_off000095ba.bin
5bfb4b435dcb86514940b54c49b47962c6ffe088b1ffd2652070924833561450		 pdf-font-stream PDF embedded font (sfnt) at offset 0x95BA 10224 bytes

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