Malicious PDF — malware analysis report

Static analysis result for SHA-256 09440c67156b4022…

MALICIOUS

PDF

47.2 KB Created: 2020-08-17 11:12:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 63bbdf22549f496e0035a1514953827e SHA-1: 7bbc76db1ea27b76fc2d79f2d59bae6164193aa4 SHA-256: 09440c67156b4022d0023558dda1927b8303c0d05277a5b50451ba0f3434f7f1
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, with one specifically identified as a malicious redirector. The document body, though heavily obfuscated, contains text related to a 'Windows 7 compatibility report fix' and a URL that aligns with this lure. The heuristic firings confirm the presence of malicious redirector links and a link farm, indicating a campaign to drive traffic to potentially harmful sites.

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=windows+7+compatibility+report+fix
    • http://vejiwen.walkonuniversity.com/uploads/1/3/2/8/132814930/rikajapuketux-tetomuripileges-nowiwoforun-davazif.pdf
    • http://files.oliviadoflein.com/uploads/1/3/0/8/130813851/3ca84060fb.pdf
    • http://files.phoebesfrippery.com/uploads/1/3/0/8/130873826/gowuzerezifa-gomafig-lizoz-koper.pdf
    • http://files.cluthaphotos.com/uploads/1/3/1/4/131482819/vizoweripebufokukuno.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/7372/4825/files/jidelidixe.pdf
    • https://cdn.shopify.com/s/files/1/0437/5052/3031/files/bridge_constructor_stunts_apk.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/wupukibasabozuxijixosi.pdf
    • https://cdn.shopify.com/s/files/1/0437/7408/3233/files/writing_inequalities_from_a_number_line_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0427/8580/0358/files/39438168924.pdf
    • https://cdn.shopify.com/s/files/1/0433/7752/4888/files/95714330211.pdf
    • https://cdn.shopify.com/s/files/1/0430/6160/8599/files/combined_gas_law_sample_problems_with_solutions.pdf
    • https://cdn.shopify.com/s/files/1/0433/5288/3352/files/83657004397.pdf
    • https://cdn.shopify.com/s/files/1/0432/0657/4240/files/13459978307.pdf
    • https://cdn.shopify.com/s/files/1/0432/7122/5494/files/rakunovitunuvotakimibi.pdf
    • https://cdn.shopify.com/s/files/1/0431/7170/9092/files/33279145905.pdf
    • https://cdn.shopify.com/s/files/1/0434/2287/5797/files/encyclopedia_of_life_writing_autobiographical_and_biographical_forms.pdf
    • https://cdn.shopify.com/s/files/1/0429/5426/0633/files/zoloron.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_off00007727.bin
9e6715bab6d344c1b66bd58225834a2f9f643a18917bfb02560019c49e2ad35b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7727 5796 bytes
font_01_sfnt_off00008aea.bin
a443d44b17b9f7a2a72a86cde878102394a5f6d716e6ab7f7f9f5348036659cb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8AEA 11076 bytes

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