Malicious PDF — malware analysis report

Static analysis result for SHA-256 410f5f3ad949f689…

MALICIOUS

PDF

51.0 KB Created: 2020-08-31 10:12:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b469cd4db89b5d3ac956833b2fd98e27 SHA-1: 105125dd9c3ac9cc8c7c55cf5e3d143fa1b08f73 SHA-256: 410f5f3ad949f6890f3d676f983df09c87d21f5af776a7e8b65347367ec02a0a
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. The document body also explicitly contains this URL, suggesting it's the primary lure. The PDF is also flagged as a link farm, likely for SEO poisoning to attract victims searching for specific documents like '2014 nec code book pdf download'. No scripts were extracted, but the embedded URL is the main indicator of compromise.

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.com/wix?keyword=2014+nec+code+book+pdf+download
    • https://cdn.shopify.com/s/files/1/0432/6634/3072/files/college_physics_serway_8th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0438/5164/5093/files/alevilerde_mum_snd_olay_nedir.pdf
    • https://cdn.shopify.com/s/files/1/0428/2885/7503/files/libiwusunefi.pdf
    • https://cdn.shopify.com/s/files/1/0428/8679/1334/files/10426370474.pdf
    • https://cdn.shopify.com/s/files/1/0469/4373/1873/files/fesujuk.pdf
    • https://static.usrfiles.com/ugd/b8c837_c89d68849be6470da648a9c094566a68.pdf
    • https://static.usrfiles.com/ugd/b42fd6_d7d281f4db5548d39bd95fe8ee435263.pdf
    • https://static.usrfiles.com/ugd/01e791_7495a0125d5b4642997364ecfbc33900.pdf
    • https://cdn.shopify.com/s/files/1/0434/7772/9430/files/doritewetipo.pdf
    • https://cdn.shopify.com/s/files/1/0433/3623/7206/files/xurawojabexeti.pdf
    • https://cdn.shopify.com/s/files/1/0429/3325/6345/files/luguvigesusotezinudedega.pdf
    • https://cdn.shopify.com/s/files/1/0433/5733/9803/files/1042864023.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_off00008817.bin
423b7408c794681d2ac40ab8f42562d84202a4a671390432da62acd81d3b493a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8817 5492 bytes
font_01_sfnt_off00009ae7.bin
3c8170a626532b5b8f12dff978ef880b4972ce13b5923e276ab81b261a96f66f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9AE7 10712 bytes

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