Malicious PDF — malware analysis report

Static analysis result for SHA-256 6fb2e08fc52ae7fd…

MALICIOUS

PDF

42.8 KB Created: 2020-08-11 06:47:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2a55103f6781374f8307d16c5a964b2a SHA-1: b1085d4220957ff7434dddcc5ecf6efbb3bd0f2d SHA-256: 6fb2e08fc52ae7fd5f039b004733bdcc736c81ed1e5f1b6b8a8eb975addd0469
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector. The document body, though heavily obfuscated, contains the URL that triggers the malicious redirector. This suggests an attempt to leverage SEO poisoning or a phishing lure to redirect users to malicious infrastructure.

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=adolescent+health+and+development+pdf
    • http://files.vistapeaklbasketballgirls.com/uploads/1/3/2/7/132740951/vujofogolidilim.pdf
    • http://files.shop.bushnvinefarm.com/uploads/1/3/2/6/132695568/kalavozanuwoxi.pdf
    • http://files.ilikekayaking.com/uploads/1/3/0/8/130814868/bomilu-bupemabitovi.pdf
    • http://files.stpaulslewisburg.org/uploads/1/3/0/7/130776674/gapizopejunatux-bewodavov-lakiju-powukonosud.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/2425/2055/files/zamunabiguniwuvenas.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/23281911610.pdf
    • https://cdn.shopify.com/s/files/1/0431/7275/7670/files/90699158499.pdf
    • https://cdn.shopify.com/s/files/1/0428/3367/4396/files/73783193452.pdf
    • https://cdn.shopify.com/s/files/1/0440/5706/7685/files/algal_cell_structure.pdf
    • https://cdn.shopify.com/s/files/1/0428/0002/1667/files/92636364322.pdf
    • https://cdn.shopify.com/s/files/1/0437/3640/0037/files/bolebusaxezifex.pdf
    • https://cdn.shopify.com/s/files/1/0428/0382/2755/files/articles_of_confederation_1643.pdf
    • https://cdn.shopify.com/s/files/1/0430/9506/4730/files/63397511380.pdf
    • https://cdn.shopify.com/s/files/1/0435/6977/4750/files/91048534522.pdf
    • https://cdn.shopify.com/s/files/1/0430/4722/3458/files/xukijadarofutisilesuxa.pdf
    • https://cdn.shopify.com/s/files/1/0429/1539/7788/files/natisorobogexitemirol.pdf
    • https://cdn.shopify.com/s/files/1/0429/5829/1093/files/mw3_cheats_xbox360.pdf
    • https://cdn.shopify.com/s/files/1/0431/6997/2392/files/72572987886.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_off00006759.bin
58c72c7adcdb6db17a5136fa72f44b914be663341846c28c61526b7353853445		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6759 5348 bytes
font_01_sfnt_off0000796f.bin
a8642ab85d6ddd286b9f7dcb5c96d69db88f6365d34e463f5db3760d83d1361e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x796F 10264 bytes

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