Malicious PDF — malware analysis report

Static analysis result for SHA-256 505fd2dffab6cfa7…

MALICIOUS

PDF

52.8 KB Created: 2020-09-17 11:39:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9bd5467e6571003865ec135b8bec9506 SHA-1: 33c5f0b0b6e635c22c8113a79793c0eb84c40679 SHA-256: 505fd2dffab6cfa7a4b3c15c6258c79f0acdb3cc906ebe111ec844ddc335b7f5
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link, specifically 'https://ttraff.me/wix?keyword=key+party+crank+yankers'. Additionally, it exhibits characteristics of a PDF link farm, with numerous links pointing to external PDF files, many of which are hosted on potentially suspicious domains. The ML classifier also strongly flagged this PDF as malicious. The presence of these elements suggests the document is designed to lure users to malicious websites.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.me/wix?keyword=key+party+crank+yankers
    • http://files.5rocksdistilling.com/uploads/1/3/1/4/131483343/5926007.pdf
    • http://getosa.wekeepyoumotivated.com/uploads/1/3/0/7/130739287/6037708.pdf
    • http://files.ryanstander.com/uploads/1/3/0/8/130813428/safijumunuruga-zagewub.pdf
    • http://files.tedcoyle.net/uploads/1/3/2/3/132302951/8460d.pdf
    • http://nepaxu.yesindustrialsupply.com/uploads/1/3/0/9/130969280/212746d.pdf
    • http://files.jjewelsstudio.com/uploads/1/3/1/1/131164431/buxutururovipem_xizuvemetozokix_vajazala_suvixed.pdf
    • http://tikuxo.brightchildcdc.com/uploads/1/3/1/3/131379578/4479570.pdf
    • http://files.homesweethomemarch.co.uk/uploads/1/3/1/4/131407547/8b7efe5bd1.pdf
    • https://cdn.shopify.com/s/files/1/0430/8480/8346/files/que_son_las_energias_alternativas.pdf
    • https://cdn.shopify.com/s/files/1/0435/2504/6431/files/amcor_sustainability_report_2017.pdf
    • https://cdn.shopify.com/s/files/1/0431/5293/3021/files/mijopedomafogoxuwinaper.pdf
    • https://cdn.shopify.com/s/files/1/0429/9587/5989/files/17895706328.pdf
    • https://cdn.shopify.com/s/files/1/0477/4654/7868/files/pavutovofuzopusawobexop.pdf
    • https://cdn.shopify.com/s/files/1/0459/9218/1919/files/dosatagimesijoxivubol.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_off000092eb.bin
fa064fc5ea5de6af99a5c494c9d362be08c5a4de218c013be117ca7aa8d8b260		 pdf-font-stream PDF embedded font (sfnt) at offset 0x92EB 5028 bytes
font_01_sfnt_off0000a41f.bin
0dcb9fc20a4e18833b4380f78e66ea231cf2eb9558e6573dd784697df21dea9c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA41F 10024 bytes

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