Malicious PDF — malware analysis report

Static analysis result for SHA-256 c1b5abcd64f2e3ce…

MALICIOUS

PDF

47.5 KB Created: 2020-09-19 20:33:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 498a113424b051a37a2f27ad4bd2261a SHA-1: 3e72e21f97980437f2326c4f1b414ae2645ec065 SHA-256: c1b5abcd64f2e3ce80f5cee20ad0b9393c1af304e579b733353d9f23e519a536
120 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with multiple links pointing to potentially malicious redirectors and PDF files. One critical heuristic identified a direct link to a known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the URL 'https://ttraff.link/wix?keyword=skyrim+se+requiem+like+mods', suggesting a lure to external content. The presence of numerous PDF links indicates a strategy to distribute malicious content or lead users to phishing sites.

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.link/wix?keyword=skyrim+se+requiem+like+mods
    • http://nakavo.vallenduuk.pl/uploads/1/3/1/0/131070382/labolilasuk.pdf
    • http://files.richardsandersonphotography.co.uk/uploads/1/3/2/7/132710743/xajomagolimavatar.pdf
    • http://files.coamexicaneatery.com/uploads/1/3/1/3/131378990/sapafinolemawago.pdf
    • http://ridabam.diannaedwardsandwriting.com/uploads/1/3/1/3/131383297/8066511.pdf
    • http://rubodet.mowaxdiscography.com/uploads/1/3/1/4/131437709/febumibidokubiz_gogepuler_jarewepa_pomapoji.pdf
    • http://files.bikeshopgillette.com/uploads/1/3/2/6/132695543/439789239d.pdf
    • https://cdn.shopify.com/s/files/1/0462/8440/6944/files/nutofaxekobax.pdf
    • https://cdn.shopify.com/s/files/1/0436/5081/0014/files/javascript_format_vscode.pdf
    • https://cdn.shopify.com/s/files/1/0429/0904/0803/files/kosizodopumilezijataxu.pdf
    • https://cdn.shopify.com/s/files/1/0428/2525/3023/files/unlock_iphone_3gs_6._1._6.pdf
    • https://cdn.shopify.com/s/files/1/0463/0416/6050/files/33412172354.pdf
    • https://2925b2c3-7a76-4c65-9598-69b39a66d2a0.filesusr.com/ugd/fc840b_c4c76bfa5c534922a3176d40e1ff1d8f.pdf?index=true
    • https://f9f6dbf9-d8e7-495f-b4ee-538ecca64916.filesusr.com/ugd/40512e_5a5789f7806f452cabaf2d58e4dbc899.pdf?index=true
    • 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_off000071f1.bin
e7cc5646468966b693c24c6383d66e21789c508f569e06b11eeb94c92cd9fe00		 pdf-font-stream PDF embedded font (sfnt) at offset 0x71F1 5156 bytes
font_01_sfnt_off0000836f.bin
f1838764a98e401fe5a3edad6eb6a7d7b41696ab16eec26b80759baee5bae06e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x836F 14704 bytes

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