Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d8ebc361a3b3ac8…

MALICIOUS

PDF

57.8 KB Created: 2020-08-06 15:33:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 89f72fe52bfb689d349e7832786b7c34 SHA-1: 716d2522d57e9511dc2cfbd38f29acab206d9b51 SHA-256: 2d8ebc361a3b3ac858c741132a86d02f8b054749f72b7712e0d4faceb2e41fb6
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains numerous embedded links, with a critical heuristic identifying a link to a known malicious redirector. The document body, though heavily obfuscated, contains text related to 'bookmark template pdf free' and the malicious redirector URL. This suggests a social engineering attack aiming to lure users to malicious 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.ru/pify?keyword=bookmark+template+pdf+free
    • http://files.saltwaterstivesbb.co.uk/uploads/1/3/1/0/131070160/1795755.pdf
    • http://files.westchesterswimconference.com/uploads/1/3/0/8/130813601/3a9850b.pdf
    • http://jupexijo.foxwineryllc.com/uploads/1/3/2/6/132696111/10843b1.pdf
    • https://cdn.shopify.com/s/files/1/0428/0342/9535/files/satapagarugebakekukivupob.pdf
    • https://cdn.shopify.com/s/files/1/0440/8298/7173/files/mp3_host_direct_link.pdf
    • https://cdn.shopify.com/s/files/1/0429/3564/8409/files/50131719139.pdf
    • https://cdn.shopify.com/s/files/1/0433/6173/0719/files/toriwiduwezegux.pdf
    • https://cdn.shopify.com/s/files/1/0434/0921/1557/files/24391578258.pdf
    • https://cdn.shopify.com/s/files/1/0427/8861/8396/files/zolomuzuvori.pdf
    • https://cdn.shopify.com/s/files/1/0437/6271/2734/files/administrator_duties.pdf
    • https://cdn.shopify.com/s/files/1/0432/5264/6050/files/bijedafekuvedorevev.pdf
    • https://cdn.shopify.com/s/files/1/0433/8135/8753/files/2481792642.pdf
    • https://cdn.shopify.com/s/files/1/0429/1218/6531/files/rovozulup.pdf
    • https://cdn.shopify.com/s/files/1/0432/0840/9250/files/lafekifafoxemevanuxinazam.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_off0000a6d5.bin
454ded84b92257e7554f02d28f1129de7af1d12dfac2c7781e08b52c4e5cda7c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA6D5 5124 bytes
font_01_sfnt_off0000b82c.bin
8504924c1173824a7fdc1241ad484c4a716b17625107d20f2cf0639cdd4ea44c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB82C 10120 bytes

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