Malicious PDF — malware analysis report

Static analysis result for SHA-256 efe5d0052808c234…

MALICIOUS

PDF

42.2 KB Created: 2020-07-10 16:00:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 911fbf4e878237ff08239f27ea73c9e5 SHA-1: 36c794ec91a06a5ced85c07090fa4e77fbf511f1 SHA-256: efe5d0052808c2344720f07a8b0423ea52bc24077f828d516bcb58a4d9d698f9
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a link farm designed for SEO manipulation. One prominent link, 'https://ttraff.ru/wb?keyword=download%20prezi%20presentation%20pdf', acts as a redirector to a series of other PDF files. This suggests a campaign to drive traffic to malicious or potentially malicious content through deceptive lures.

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/wb?keyword=download%20prezi%20presentation%20pdf
    • http://files.chen-lu.co/uploads/1/3/1/4/131406269/lesovigogal.pdf
    • http://files.dizzycoach.com/uploads/1/3/0/8/130874129/redesoba-xurun.pdf
    • http://files.dental-device.com/uploads/1/3/2/6/132695489/8cd911c6.pdf
    • http://files.trevelle.com/uploads/1/3/0/8/130874513/bb41cc.pdf
    • http://files.caroldonlon.com/uploads/1/3/1/4/131405940/rameneriwizol.pdf
    • http://files.kwfootography.com/uploads/1/3/0/7/130775050/333e17e.pdf
    • http://files.missbrittanyteaches.com/uploads/1/3/2/8/132815385/tedudozefexu.pdf
    • http://files.mltcoins.com/uploads/1/3/0/8/130874647/jurosomegenuxoguza.pdf
    • http://files.gemmstts.com/uploads/1/3/0/7/130740493/xezolujibebiron.pdf
    • http://files.fredhaaseart.com/uploads/1/3/1/3/131378918/kesoze.pdf
    • http://files.theepikapproach.com/uploads/1/3/2/8/132815008/afe1625eed.pdf
    • http://files.burghyart.com/uploads/1/3/1/8/131871772/vevelu.pdf
    • https://repotava.files.wordpress.com/2020/06/xoxunatemedowirusazul.pdf
    • https://nuxezobexet.files.wordpress.com/2020/07/71129315762.pdf
    • https://zemijedo.files.wordpress.com/2020/06/xedaworakufos.pdf
    • https://kojuxow.files.wordpress.com/2020/07/42548807892.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/35209966956.pdf
    • https://cdn.shopify.com/s/files/1/0430/8451/3440/files/95121142914.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/texojorigerusoxuduk.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_off00006822.bin
e38ffccdf212948ef3951b9f4d3aa0969d8d91b926e2873cc445f6fc69788780		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6822 4964 bytes
font_01_sfnt_off00007927.bin
0e9d5e0fba7ed2a8167b9eb756dc9b8d2c0a5a782050af3d40700b2a8eb6254a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7927 10124 bytes

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