Malicious PDF — malware analysis report

Static analysis result for SHA-256 288634bca30a217d…

MALICIOUS

PDF

39.1 KB Created: 2020-08-17 06:46:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 812ed2b8c578d1a34a1b4d0a3bfb7c33 SHA-1: b312d65b5d0b5d106e0bccb03f37371d87d2b717 SHA-256: 288634bca30a217d85c000fc4b4cb08d66786aeb7428aa591b1cffe2b8dbff70
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, a common tactic for SEO poisoning or link farming. One of these links, 'https://ttraff.cc/pify?keyword=violin+sheet+music+sad+song', is flagged as a known malicious redirector. The document body itself is heavily obfuscated and contains what appears to be junk data, but the presence of the malicious redirector and the link farm strongly suggests an intent to direct users to harmful content.

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=violin+sheet+music+sad+song
    • http://files.artexfurniture.com/uploads/1/3/0/7/130739831/xivagexezexanowe.pdf
    • http://files.brunswickpublicart.org/uploads/1/3/1/4/131411857/e2f22bf3a.pdf
    • https://cdn.shopify.com/s/files/1/0431/4834/5500/files/banupenalojekofajedixugu.pdf
    • https://cdn.shopify.com/s/files/1/0433/4501/9035/files/14339381022.pdf
    • https://cdn.shopify.com/s/files/1/0434/7507/5225/files/butterfly_valve_specification.pdf
    • https://cdn.shopify.com/s/files/1/0437/1123/4199/files/standard_costing_and_variance_analysis_problems_and_solutions.pdf
    • https://cdn.shopify.com/s/files/1/0429/2971/7407/files/16217386902.pdf
    • https://cdn.shopify.com/s/files/1/0436/6978/2693/files/54328521146.pdf
    • https://cdn.shopify.com/s/files/1/0431/2314/6906/files/vukodemafegubaxurer.pdf
    • https://cdn.shopify.com/s/files/1/0431/3215/8116/files/87417298594.pdf
    • https://cdn.shopify.com/s/files/1/0428/2236/9446/files/31253241999.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_off00005420.bin
155a55194828151f321cff05805fa015652fcc1c3458152a6c0f522905078019		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5420 5224 bytes
font_01_sfnt_off000065b8.bin
a590b351784253d264a67177e1847625581822685f99b2366d583b290a1f88f9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x65B8 13660 bytes

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