Malicious PDF — malware analysis report

Static analysis result for SHA-256 359015c04352f251…

MALICIOUS

PDF

52.7 KB Created: 2020-08-08 23:58:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2a16cbe2c4f94382ddd9b04a51d7886f SHA-1: ac35cfe36a423da655fa20af7a793d50deacff1a SHA-256: 359015c04352f2518a20c749601128d96794dde73fd62c0c2d111d9512370eaf
154 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one specifically identified as a malicious redirector. The primary link, 'https://ttraff.com/pify?keyword=list+of+formulas+in+strength+of+materials+pdf', is designed to lead users to potentially harmful content. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' confirms the malicious nature of this redirection. The presence of numerous other links to Shopify domains suggests a link farm or SEO manipulation tactic to obscure the 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.com/pify?keyword=list+of+formulas+in+strength+of+materials+pdf
    • http://rujawoz.monarch-creations.com/uploads/1/3/1/8/131856772/1263453.pdf
    • http://files.marsokickz.com/uploads/1/3/2/7/132741149/d90c72411be2.pdf
    • http://files.thebagelers.com/uploads/1/3/0/8/130813514/kigubepupofew.pdf
    • https://cdn.shopify.com/s/files/1/0430/9798/1082/files/82789429322.pdf
    • https://cdn.shopify.com/s/files/1/0431/2091/8679/files/sistem_bilangan_real_kalkulus.pdf
    • https://cdn.shopify.com/s/files/1/0433/7690/2309/files/atkins_fisico_quimica.pdf
    • https://cdn.shopify.com/s/files/1/0438/1474/8322/files/dibujarte_book_3.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/wabodenerevugibew.pdf
    • https://cdn.shopify.com/s/files/1/0428/5412/1635/files/mogawetuwux.pdf
    • https://cdn.shopify.com/s/files/1/0434/6331/1512/files/90974554755.pdf
    • https://cdn.shopify.com/s/files/1/0428/3770/4867/files/dixenadetedegujiparo.pdf
    • https://cdn.shopify.com/s/files/1/0428/7974/6207/files/wuvatabunozapexiruxam.pdf
    • https://cdn.shopify.com/s/files/1/0431/7849/2062/files/wewaratevanil.pdf
    • https://cdn.shopify.com/s/files/1/0427/8432/5798/files/memamuzafobagow.pdf
    • https://cdn.shopify.com/s/files/1/0432/2010/7424/files/48115248934.pdf
    • https://cdn.shopify.com/s/files/1/0432/6375/4408/files/74779884680.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008334.bin
ad3bfcaab2265360e7b01ca4650fb1dece61e16c97ab98b1501e1db991cd918d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8334 5276 bytes
font_01_sfnt_off000094ec.bin
8e45a1be8f2d50abb6a2bac9d279d4740dafea6f5c8ef2f4210fdee75ab88915		 pdf-font-stream PDF embedded font (sfnt) at offset 0x94EC 10208 bytes
font_02_sfnt_off0000b7cc.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB7CC 4324 bytes

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