Malicious PDF — malware analysis report

Static analysis result for SHA-256 c54ed6fb0c7ed509…

MALICIOUS

PDF

42.0 KB Created: 2020-08-04 03:54:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 16e079c41219ad0d5465ca7b7f63447d SHA-1: d836fe0ff378edcb1b03829cd153f8e9ab8826bf SHA-256: c54ed6fb0c7ed509e4b015c8df069be73ec7666d0b80175d992f68cc9f0c0095
128 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as a download button, aiming to trick users into visiting a malicious URL. The document body and heuristics indicate a lure for a 'PDF to Word converter' to encourage clicks. The primary malicious IOC is the redirector URL, which leads to further potentially harmful content.

Heuristics 4

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=online+converter+pdf+to+word+free+download+full+version
    • http://gutibivet.poconoavianresearch.org/uploads/1/3/1/8/131857334/25912d8.pdf
    • http://files.anthopoulin.com/uploads/1/3/0/7/130776619/fozag-wajewulesavub.pdf
    • http://files.riverreachestates.ca/uploads/1/3/0/7/130775220/mugatome.pdf
    • https://cdn.shopify.com/s/files/1/0433/3993/9994/files/76922269621.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/21533622499.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/mobisibat.pdf
    • https://cdn.shopify.com/s/files/1/0439/0957/8904/files/peter_pan_francais.pdf
    • https://cdn.shopify.com/s/files/1/0428/6559/0438/files/dibiwuketimunowu.pdf
    • https://cdn.shopify.com/s/files/1/0430/7959/8229/files/67310925755.pdf
    • https://cdn.shopify.com/s/files/1/0427/8878/2236/files/tekemojose.pdf
    • https://cdn.shopify.com/s/files/1/0431/4392/1820/files/kegasipuremite.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/99781003244.pdf
    • https://cdn.shopify.com/s/files/1/0435/8209/5517/files/fisher_yates_shuffle_java.pdf
    • https://cdn.shopify.com/s/files/1/0431/5322/7936/files/42194189326.pdf
    • https://cdn.shopify.com/s/files/1/0439/9860/9566/files/88964256383.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_off000065e4.bin
7cab38eb6032bd6a2210453b078f4afe432a8a87bf894221e7873a9b2bbf03a8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x65E4 5328 bytes
font_01_sfnt_off00007829.bin
484a03675a24632e74d4115cf69b91fa4e94a3feeb693d637b2d8a06a39859c7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7829 10084 bytes

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