Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f56e71bde3be214…

MALICIOUS

PDF

66.8 KB Created: 2020-08-07 08:47:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2b6ec1bcf34262f5f3b6560cf4f92d56 SHA-1: cb099d20ccea9569f3e1df0a5edfd276a37adc82 SHA-256: 5f56e71bde3be214bd86199528e43364227d95d7858c7587fb781157afee25a0
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com', which is disguised as a banking service chronicle. This indicates a phishing or malware distribution attempt. The presence of numerous other links, many benign, suggests a link farm or SEO poisoning tactic to obscure the malicious destination. While no scripts were extracted, the overall structure and the malicious redirector strongly suggest a phishing or malicious content delivery vector.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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/pify?keyword=banking+service+chronicle+february+2020+pdf
    • http://files.adamsarts.com/uploads/1/3/0/9/130969915/rokiwe.pdf
    • http://files.swtradingcompany.com/uploads/1/3/0/8/130873769/1018955.pdf
    • http://files.paranormalworldofgsreynolds.com/uploads/1/3/0/7/130776726/5c88f6471d.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fedorahosted.org/lohit
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/78476378890.pdf
    • https://cdn.shopify.com/s/files/1/0431/5031/1579/files/60463060325.pdf
    • https://cdn.shopify.com/s/files/1/0431/3579/5354/files/zimudugegokotenotuwol.pdf
    • https://cdn.shopify.com/s/files/1/0437/8905/8206/files/tomb_of_annihilation_magic_items.pdf
    • https://cdn.shopify.com/s/files/1/0433/8463/5544/files/12036736826.pdf
    • https://cdn.shopify.com/s/files/1/0430/6649/1031/files/microsoft_windows_networking_essentials.pdf
    • https://cdn.shopify.com/s/files/1/0437/9367/8497/files/wabirar.pdf
    • https://cdn.shopify.com/s/files/1/0435/8127/6319/files/35155012071.pdf
    • https://cdn.shopify.com/s/files/1/0429/9590/8761/files/22192084650.pdf
    • https://cdn.shopify.com/s/files/1/0428/4134/2108/files/kukadodaxobaseg.pdf
    • https://cdn.shopify.com/s/files/1/0428/9275/5111/files/47171236605.pdf
    • https://cdn.shopify.com/s/files/1/0429/1421/8151/files/30915992331.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/
    • http://scripts.sil.org/OFL
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNU
    • http://www.gnu.org/copyleft/gpl.htmRegular

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009479.bin
06b585dfe54dd38d7a01e2e62b2611a2033e637fffe6a1e46b353ea005cfdf48		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9479 6108 bytes
font_01_sfnt_off0000a947.bin
a7c194c348f4bc26aad06ae1fa1eadf76503a3aca856ff80314c3d87a816eea9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA947 3720 bytes
font_02_sfnt_off0000b4a7.bin
51fd8c8e2e491f331fd95e4f91c13ba3297a78a7d935d7f64f4f4dc1d38846ab		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB4A7 12580 bytes
font_03_sfnt_off0000dcc8.bin
b071c55827a6cf28a984ad60a8a04c136b9b9c0793e097ba377090c31410603d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDCC8 10272 bytes

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