Malicious PDF — malware analysis report

Static analysis result for SHA-256 84405c7d05b1bbff…

MALICIOUS

PDF

51.2 KB Created: 2020-09-01 21:00:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 438e0fc6cf58c54d7d134e5fc2c14e00 SHA-1: 4b97e09effc84479e8988126960972c0d3115b2d SHA-256: 84405c7d05b1bbfff6c9fcd80ce9778ef254f41818719ddda08a615b894b9a2a
120 Risk Score

Malware Insights

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

The PDF file contains a lure for free piano sheet music, which is a common social engineering tactic. It embeds a link that redirects to a known malicious domain, ttraff.com, indicating a phishing or malware distribution attempt. The file also contains a large number of links to external PDFs, suggesting it is part of a link farm designed to improve search engine ranking for malicious 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.com/wix?keyword=fur+elise+piano+sheet+free+pdf
    • https://static.usrfiles.com/ugd/191a6d_7b345768e78a48b19418089df5f42253.pdf
    • https://static.usrfiles.com/ugd/822ecd_e5d265c31db04e548ce6e81a0099b07f.pdf
    • https://static.usrfiles.com/ugd/b8c837_97d3df522ca3497f83e214402bf74fbb.pdf
    • https://cdn.shopify.com/s/files/1/0435/3864/5144/files/45297351142.pdf
    • https://cdn.shopify.com/s/files/1/0433/0058/5636/files/16124326945.pdf
    • https://cdn.shopify.com/s/files/1/0431/1741/2501/files/vedalabekunavolil.pdf
    • https://cdn.shopify.com/s/files/1/0435/3287/7976/files/cutting_edge_knives.pdf
    • https://static.usrfiles.com/ugd/b8c837_492497955d6049b1af9958149695b4b1.pdf
    • https://static.usrfiles.com/ugd/b8c837_d08a0134108a41e787762ba4e8b11739.pdf
    • https://static.usrfiles.com/ugd/b8c837_d1f7a7240fc547119f6dc051bed9310f.pdf
    • https://static.usrfiles.com/ugd/b8c837_e43cd70dca8b46ba9686f78f1d9aba3d.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000727d.bin
71701baa52eb87c6960dd0bfbf9420492cb57be88204a3d210a7593b13a80ffc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x727D 5084 bytes
font_01_sfnt_off000083c3.bin
105ea6283c3718b21e0f01389fcb1c3c969b297d3bf433e49c5362d6afc81e96		 pdf-font-stream PDF embedded font (sfnt) at offset 0x83C3 11684 bytes
font_02_sfnt_off0000ab07.bin
007377d672ad35e960bd13d3f92b574e68300ebd174b34df27fa78aa6545cdcd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAB07 16076 bytes

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