Malicious PDF — malware analysis report

Static analysis result for SHA-256 3298dc24a70a947a…

MALICIOUS

PDF

48.9 KB Created: 2020-08-05 17:09:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b1d4c77a1d4d3e328b3e23401635ad6b SHA-1: 25e279212278ba70b0998a9353897baf00d4ba46 SHA-256: 3298dc24a70a947a3151dfb4e30f42e20f4c5438079021a57050146f900479d9
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, pointing to 'ttraff.cc'. This URL is embedded within the document body and is also listed as an extracted URL. The PDF also exhibits characteristics of a link farm, with numerous external links, many hosted on cdn.shopify.com. The ML classifier strongly flagged this PDF as malicious. The primary attack pattern involves tricking the user into clicking the malicious link, which then likely leads to a phishing page or malware download.

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.cc/pify?keyword=brink+anh%25C3%25A4ngerkupplung+abe+pdf
    • http://files.creeksidepto.com/uploads/1/3/0/8/130873839/roxejimoj-tewupipugabokor-nulurigedagi-zaxakegar.pdf
    • http://files.aaronsgiftsfromhome.com/uploads/1/3/0/7/130775125/d20bf982d.pdf
    • http://files.improvemydealership.com/uploads/1/3/2/7/132741764/596899.pdf
    • http://files.recyclebelize.com/uploads/1/3/1/4/131438891/1685775.pdf
    • https://cdn.shopify.com/s/files/1/0435/1927/9258/files/danny_phantom_episodes.pdf
    • https://cdn.shopify.com/s/files/1/0430/5820/0725/files/nutakol.pdf
    • https://cdn.shopify.com/s/files/1/0431/4421/6730/files/63993162283.pdf
    • https://cdn.shopify.com/s/files/1/0432/2584/1821/files/97232920760.pdf
    • https://cdn.shopify.com/s/files/1/0431/1125/2132/files/dixevudagiz.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kilezibuvi.pdf
    • https://cdn.shopify.com/s/files/1/0432/5238/3907/files/bhagavata_purana_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0427/8370/3206/files/kinurifika.pdf
    • https://cdn.shopify.com/s/files/1/0436/6221/3273/files/88829773289.pdf
    • https://cdn.shopify.com/s/files/1/0429/7388/8671/files/21321463781.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_off00007e28.bin
3c45e452a1e7e400daf25213fe03600451658e3a4acafb85a6fb9076d4aaf3cf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E28 5612 bytes
font_01_sfnt_off000090ad.bin
331f9a2f5d266cca5e7577d44fa0641500f9ab38e03070eb181bc733eb841cf6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x90AD 11296 bytes

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