Malicious PDF — malware analysis report

Static analysis result for SHA-256 fdc4b39b3fef0cef…

MALICIOUS

PDF

58.6 KB Created: 2020-07-23 11:17:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 43f485be0cb8b261fbdc30975a75e0bd SHA-1: 5cd0fd69cc51a3e3daa515ce1fe19843a086c82d SHA-256: fdc4b39b3fef0cef13b86fd9b656a38d4b9aa090cc7207bf25038956f8b4feb9
120 Risk Score

Malware Insights

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

The PDF file contains multiple embedded links, with one specifically pointing to a known malicious redirector. This redirector is designed to lure users to potentially harmful content, as indicated by the 'PDF_MALICIOUS_REDIRECTOR_LINK' heuristic. The presence of a large number of external links, identified by 'PDF_SEO_LINK_FARM', further suggests an attempt to manipulate search results or distribute content through a link farm. The primary malicious IOC is the redirector URL.

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=types+of+audit+report+ppt
    • http://files.gatewaycafe.org/uploads/1/3/1/1/131164152/7208892.pdf
    • http://files.thamilkdrop.com/uploads/1/3/1/4/131437295/xaguma_tulezamilubiso_kotule.pdf
    • http://files.rocklandcountyumpires.com/uploads/1/3/2/3/132303170/rilovokepuvo.pdf
    • https://cdn.shopify.com/s/files/1/0429/6992/3740/files/53233428213.pdf
    • https://cdn.shopify.com/s/files/1/0427/7701/8524/files/naluzekofijatiroxutu.pdf
    • https://cdn.shopify.com/s/files/1/0430/7678/0192/files/gixel.pdf
    • https://cdn.shopify.com/s/files/1/0436/1686/2371/files/17551705776.pdf
    • https://cdn.shopify.com/s/files/1/0430/7632/1434/files/dezodefebijitimuwuj.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/bifivejeg.pdf
    • https://cdn.shopify.com/s/files/1/0427/9920/2467/files/wimepe.pdf
    • https://cdn.shopify.com/s/files/1/0431/6341/8784/files/nifokijuzexebevexa.pdf
    • https://cdn.shopify.com/s/files/1/0432/9183/6572/files/zemidenego.pdf
    • https://cdn.shopify.com/s/files/1/0438/8493/7384/files/kudizuxudakudozukazibox.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/69262577592.pdf
    • https://cdn.shopify.com/s/files/1/0433/2814/3510/files/rizefe.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_off0000a8e1.bin
1c14227af14491e61b6e1089ed8ea52f83a9f9a672b387afc4abc5b3261e81a7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA8E1 4828 bytes
font_01_sfnt_off0000b96f.bin
e44c59f9b27710bd668bf1e4027c89c3fde17c3c1f666fc037a7efa629a6192a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB96F 10392 bytes

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