Malicious PDF — malware analysis report

Static analysis result for SHA-256 4332da41df4a1759…

MALICIOUS

PDF

47.8 KB Created: 2020-07-21 20:02:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 35e82e3a770c8d96cf686846baee0b13 SHA-1: 77ea7311ddc0c71a9e776e153225d8cf97d84026 SHA-256: 4332da41df4a1759aa300c0a77912e217898d50749f9ca607551520373e185a3
152 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.ru', which is used to lure victims. Additionally, a PDF link farm heuristic indicates the document is designed to host numerous external links. The ML classifier strongly flagged this PDF as malicious. The document body, though heavily obfuscated, suggests a lure related to 'Central bank of india neft form download pdf', reinforcing the phishing or malware distribution intent.

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.ru/pify?keyword=central+bank+of+india+neft+form+download+pdf
    • http://files.hadassahcalligraphy.com/uploads/1/3/0/7/130775565/cccb4683d7a6c.pdf
    • http://files.carrcommunity.org/uploads/1/3/2/6/132695572/cdc1ca608.pdf
    • http://files.jlongkandb.co.uk/uploads/1/3/1/6/131606368/da1337258866eff.pdf
    • http://files.bellecreekresources.net/uploads/1/3/1/3/131398253/5630458.pdf
    • http://files.bell
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/vitalifurefafimeribedewo.pdf
    • https://cdn.shopify.com/s/files/1/0431/3104/4007/files/5746047794.pdf
    • https://cdn.shopify.com/s/files/1/0430/6845/7113/files/dasenida.pdf
    • https://xefipun.files.wordpress.com/2020/07/laridut.pdf
    • https://perorukone.files.wordpress.com/2020/07/rawisubu.pdf
    • https://sejidinaduk.files.wordpress.com/2020/07/jerurifasuropiv.pdf
    • https://cdn.shopify.com/s/files/1/0428/1715/9335/files/25752642007.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nuruge.pdf
    • https://cdn.shopify.com/s/files/1/0433/4115/2421/files/82252805052.pdf
    • https://cdn.shopify.com/s/files/1/0433/8014/6343/files/12330337623.pdf
    • https://cdn.shopify.com/s/files/1/0430/9018/2304/files/20180547529.pdf
    • https://cdn.shopify.com/s/files/1/0430/2677/6227/files/kopofuziregebusezuduvab.pdf
    • https://cdn.shopify.com/s/files/1/0431/0568/1557/files/58805954186.pdf
    • https://cdn.shopify.com/s/files/1/0434/5495/5672/files/17166092359.pdf
    • https://cdn.shopify.com/s/files/1/0427/8249/0791/files/56009432890.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_off00007e26.bin
3168ff12a8523e2b219d858dfc6473d44b8f5e676c7b5060d48890f248715ae5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E26 5116 bytes
font_01_sfnt_off00008f82.bin
76fb119b3c56d81acec47ecdc9238d04e6f515847f14520e3b31afb61ef88d61		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8F82 9880 bytes

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