Malicious PDF — malware analysis report

Static analysis result for SHA-256 556c6591a6418f18…

MALICIOUS

PDF

43.2 KB Created: 2020-08-03 13:38:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4bde7bb512f6891996b2cb341690fd29 SHA-1: 287bc057b5ad4c42df640ddf4a1b7a802defd8d2 SHA-256: 556c6591a6418f182d95f94969f563e6e2dfd41580e07eec9908717e04d0d934
128 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 User Execution: Malicious File

The PDF file contains a link farm pointing to various PDF files, likely for SEO poisoning or to distribute malicious content. The primary link directs to a known malicious redirector, 'ttraff.cc', which is likely used to obscure the final destination. The presence of a visual download button further supports a social engineering lure. No scripts were extracted from this sample.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=btet+question+paper+2020+pdf+download
    • http://files.languagetree.org.uk/uploads/1/3/1/4/131438389/c260d.pdf
    • http://files.lifesuccessfully.com/uploads/1/3/0/8/130813645/navadoda_fofof.pdf
    • http://files.ninjateachers.org/uploads/1/3/0/8/130813054/5383027.pdf
    • https://cdn.shopify.com/s/files/1/0427/9068/2783/files/36949068303.pdf
    • https://cdn.shopify.com/s/files/1/0432/4936/9252/files/74581330195.pdf
    • https://cdn.shopify.com/s/files/1/0433/5783/1326/files/tebokagekofivu.pdf
    • https://cdn.shopify.com/s/files/1/0437/2866/6785/files/leladubegogezojajurip.pdf
    • https://cdn.shopify.com/s/files/1/0431/5794/6522/files/nuxisezenatutozamiwizu.pdf
    • https://cdn.shopify.com/s/files/1/0430/8926/4794/files/6372896241.pdf
    • https://cdn.shopify.com/s/files/1/0434/0760/5923/files/jekarubika.pdf
    • https://cdn.shopify.com/s/files/1/0428/1463/6198/files/nimepexigutipeleputaxe.pdf
    • https://cdn.shopify.com/s/files/1/0438/6645/6224/files/8415566695.pdf
    • https://cdn.shopify.com/s/files/1/0431/0925/3282/files/81714296240.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_off00006873.bin
87e81037cb89d529f0924d0a8449e16d9c0c37ec0df9dcf2f3c1d3fcfa707925		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6873 5576 bytes
font_01_sfnt_off00007b8c.bin
ff7fc883dcec3d7b87b164709fd2e6f5bc728caa268d82e7a6dd2b5a1c386c05		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B8C 10956 bytes

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