Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9d40a9bfcff4e62…

MALICIOUS

PDF

43.7 KB Created: 2020-08-17 17:33:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ce531b7deccf594c5cd3ded8576b381f SHA-1: 6dfde3e6d31f7e8f4c3d136360fe6b2e6fb081ce SHA-256: d9d40a9bfcff4e627768c32ed59dfbcd7d996bb85aa87bfd31cc11f9a02a0746
160 Risk Score

Malware Insights

MITRE ATT&CK
T1059.003 Windows Command Shell T1204.002 Malicious Link

The PDF contains a heuristic firing for a malicious redirector link pointing to 'ttraff.com', which is also present in the document body. Additionally, a critical heuristic indicates a link farm of PDF files hosted on Shopify, with one specific PDF being identified. The document also contains a lure to execute commands via the clipboard, suggesting an attempt to download and run a secondary payload.

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.
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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/pify?keyword=android+bitmap+to+rgb+byte+array
    • http://files.marinarena.com/uploads/1/3/1/3/131397973/511152.pdf
    • http://files.palmettoswingevents.com/uploads/1/3/2/8/132814241/8523336.pdf
    • http://files.lukefranco.org/uploads/1/3/0/7/130776346/davola_jugulepa_kuzew.pdf
    • https://cdn.shopify.com/s/files/1/0433/1801/8216/files/kirarogurififekevakol.pdf
    • https://cdn.shopify.com/s/files/1/0434/3873/5517/files/understanding_analysis_solutions.pdf
    • https://cdn.shopify.com/s/files/1/0433/7431/3621/files/64866180357.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/57148414383.pdf
    • https://cdn.shopify.com/s/files/1/0438/0744/1053/files/vorobota.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/38659434623.pdf
    • https://cdn.shopify.com/s/files/1/0429/0645/2127/files/gunotodupizekojotamebid.pdf
    • https://cdn.shopify.com/s/files/1/0440/8626/3960/files/calendars_2020.pdf
    • https://cdn.shopify.com/s/files/1/0436/4494/4542/files/50629751935.pdf
    • https://cdn.shopify.com/s/files/1/0434/7474/7558/files/49612468868.pdf
    • https://cdn.shopify.com/s/files/1/0428/5543/2348/files/dunovi.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_off000069b5.bin
cfbceec75eb1280b42af725fc9bcc544f46e420e6497071e9c629c427465ea61		 pdf-font-stream PDF embedded font (sfnt) at offset 0x69B5 5300 bytes
font_01_sfnt_off00007b9e.bin
55ca718ee598f131f15266bd8863844af723966d463ba4d0f786210feaf58845		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B9E 11908 bytes

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