Malicious PDF — malware analysis report

Static analysis result for SHA-256 24348f357b84f203…

MALICIOUS

PDF

61.3 KB Created: 2020-09-12 21:15:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 041b5267b9df12bb0e8104877c5b1c4a SHA-1: 782cf1c1403194919090cb8785f9e47c41b2642f SHA-256: 24348f357b84f203d7d94268e51f844674c639adb6260da4f61d48b35827a8fb
150 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with many links pointing to SEO-optimized PDF files. One of the embedded links, https://ttraff.cc/pify?keyword=celula+vegetal+partes+y+funciones, is a known malicious redirector. The ML classifier also flagged this PDF with high confidence. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=celula+vegetal+partes+y+funciones
    • http://files.mtacdiamondbar.org/uploads/1/3/0/7/130739789/e71f3.pdf
    • http://wagefol.dporganizing.com/uploads/1/3/0/7/130775732/4595382.pdf
    • http://files.stpetersindy.org/uploads/1/3/1/3/131380063/aa5daeec.pdf
    • http://files.porthuronchurchofchrist.org/uploads/1/3/1/4/131437532/57a348c734136.pdf
    • http://files.ciaranculliganphotography.com/uploads/1/3/1/3/131384359/kopetaxuzap_xinamafum_mefubove_kirizage.pdf
    • http://files.archaeospain.com/uploads/1/3/0/7/130775025/pozebavaboran.pdf
    • http://devotu.mummasonthemove.com.au/uploads/1/3/1/0/131070147/8839088.pdf
    • http://files.kathrynsantaphotography.com/uploads/1/3/1/4/131438111/3eea38982f7f.pdf
    • https://cdn.shopify.com/s/files/1/0430/7196/3296/files/7819646984.pdf
    • https://cdn.shopify.com/s/files/1/0449/2935/1835/files/number_worksheets_kindergarten.pdf
    • https://cdn.shopify.com/s/files/1/0441/0490/8952/files/ishq_chunariya_audio_song.pdf
    • https://cdn.shopify.com/s/files/1/0431/2452/3170/files/druid_circle_of_the_shepherd.pdf
    • https://cdn.shopify.com/s/files/1/0429/4849/3475/files/formal_brown_shoes_online_shopping.pdf
    • https://cdn.shopify.com/s/files/1/0438/4122/4869/files/awas_yojana_ahmedabad_online_form_2019.pdf
    • https://cdn.shopify.com/s/files/1/0437/0300/9430/files/52343587297.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_off0000ae8d.bin
45afb415e6b43a6f114d496b4eaa9529a61b3b0e9fdfe4b2811e8bccd757b288		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAE8D 5248 bytes
font_01_sfnt_off0000c08c.bin
e860b6826c4a74752b7703ba6c76b97483bc6ed1716e570665ed1a50ea68a0cd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC08C 11600 bytes

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