Malicious PDF — malware analysis report

Static analysis result for SHA-256 146a77da27a72159…

MALICIOUS

PDF

48.7 KB Created: 2020-08-03 18:56:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 92c24a8a85211b0d66ee0145dad0ad9e SHA-1: e2317049ce8f1527675afbde4baf91a11f43b7fe SHA-256: 146a77da27a721592e9182e82b9cb032ede30bc5060a9b90c4aca07187ba03ce
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.cc, which is likely used to obscure the final destination of the malicious payload. The document body, though heavily obfuscated, contains text that suggests a lure related to 'Amadeus system pdf'. The presence of embedded URLs and the ML classifier's high confidence score indicate malicious 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.cc/pify?keyword=amadeus+system+pdf
    • http://files.beachgirlbling.com/uploads/1/3/0/7/130776573/3f6967.pdf
    • http://files.jacintaviolin.com/uploads/1/3/1/6/131637224/liritoro_jisivoke_figirogopaluzul_fatoxi.pdf
    • http://files.ajaanimations.com/uploads/1/3/1/4/131483154/potemuniketol.pdf
    • http://files.nativetales.com/uploads/1/3/0/7/130775942/b90bae542e.pdf
    • http://files.saverosselevator.com/uploads/1/3/2/3/132302894/xatotitit.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/wofizafadunemewu.pdf
    • https://cdn.shopify.com/s/files/1/0449/8112/5278/files/assonance_and_alliteration_are_different_types_of.pdf
    • https://cdn.shopify.com/s/files/1/0429/6556/5589/files/sowosefuvakadovidenetuke.pdf
    • https://cdn.shopify.com/s/files/1/0429/2067/3433/files/pajunowuwododotobunegew.pdf
    • https://cdn.shopify.com/s/files/1/0429/9508/9571/files/tirajafuzoloki.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/pamuzinesikajojefex.pdf
    • https://cdn.shopify.com/s/files/1/0436/9167/1705/files/81625800188.pdf
    • https://cdn.shopify.com/s/files/1/0437/4347/7909/files/worajomebivetuze.pdf
    • https://cdn.shopify.com/s/files/1/0434/0659/0106/files/5690041680.pdf
    • https://cdn.shopify.com/s/files/1/0434/1478/2104/files/15045290194.pdf
    • https://cdn.shopify.com/s/files/1/0429/2080/4518/files/bridge_cheat_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0431/3799/0813/files/cetoacidosis_diabetica_pediatria_2020.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000825e.bin
c9424515b1887f765e05635318ebb91a033c91e06207fbcc39f6c4e3ac1b8faa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x825E 5148 bytes
font_01_sfnt_off000093e0.bin
eb8fe9cd9992bed75b38f1ed20db80fa866d50dc483ddebf41cd264aab1a9074		 pdf-font-stream PDF embedded font (sfnt) at offset 0x93E0 9956 bytes

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