Malicious PDF — malware analysis report

Static analysis result for SHA-256 367e849d44690757…

MALICIOUS

PDF

55.8 KB Created: 2020-08-25 06:43:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 22ce3911938dc2f04608dcb8c6717415 SHA-1: f35d17301d66d335bc1a3c9a1c5426bd80a5dad7 SHA-256: 367e849d446907578997f70fdab0e7a59fe5e21d47484a0891cfc581119393ae
154 Risk Score

Malware Insights

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

The PDF document contains multiple embedded links, with one specifically identified as a malicious redirector. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' indicates that the URL https://ttraff.cc/pify?keyword=economist+14+july+2018+pdf is part of a known malicious infrastructure. Additionally, the 'PDF_SEO_LINK_FARM' heuristic suggests the document is designed to host numerous external links, likely for SEO manipulation or to distribute further malicious content. The ML classifier strongly supports the malicious nature of this PDF.

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=economist+14+july+2018+pdf
    • http://nabok.venga-japan.com/uploads/1/3/2/7/132712116/8958582.pdf
    • http://fejowo.thailandtravelexplorer.com/uploads/1/3/1/3/131398091/wudira.pdf
    • http://files.adelaidechickensittingservice.com/uploads/1/3/1/8/131857071/wovakemeluwo-bokevanukapaku.pdf
    • http://xukoxe.sheeshees.com/uploads/1/3/0/7/130776728/aaef0b60c6.pdf
    • http://files.happilyeveralaska.com/uploads/1/3/1/3/131379213/2a4c641367c4.pdf
    • https://cdn.shopify.com/s/files/1/0434/3113/3351/files/cv_maker_templates.pdf
    • https://cdn.shopify.com/s/files/1/0435/1868/9432/files/36852389509.pdf
    • https://cdn.shopify.com/s/files/1/0435/3510/6203/files/bed_sheets_sets_sale.pdf
    • https://cdn.shopify.com/s/files/1/0435/5417/7183/files/noxema.pdf
    • https://cdn.shopify.com/s/files/1/0434/2553/0005/files/jixuzaritomutuxufuzu.pdf
    • https://cdn.shopify.com/s/files/1/0433/1533/1227/files/xiledoposoragabivuv.pdf
    • https://cdn.shopify.com/s/files/1/0429/1395/6007/files/radujuxojom.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/65587220918.pdf
    • https://cdn.shopify.com/s/files/1/0431/1734/6976/files/loditotepemupekuditigo.pdf
    • https://cdn.shopify.com/s/files/1/0464/6495/8616/files/4th_dimension_kanye_kid_cudi.pdf
    • https://cdn.shopify.com/s/files/1/0433/0032/3478/files/sri_devi_bhagavatam_telugu_free_download.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_off00008d35.bin
acc8656113ad34f9fcd87915235e0644e1236e5383b9fed39276cb29a5e4696a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8D35 5740 bytes
font_01_sfnt_off0000a0cb.bin
732a74b96f267bfe192a6d027363ac62322d1123d89e95056e964ff72c9e16bb		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA0CB 15400 bytes

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