Malicious PDF — malware analysis report

Static analysis result for SHA-256 81b29ebcb3ef125b…

MALICIOUS

PDF

45.0 KB Created: 2020-08-26 08:55:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f0f6d838cfa00f49c46667c52c3b2711 SHA-1: d7ab5a23d8261d9f146345bcc9d9c4b375e76ccd SHA-256: 81b29ebcb3ef125b70d80539d76d0781b89a795933fc8f913be305c749c83ee6
162 Risk Score

Malware Insights

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

The PDF contains a lure for a financial consultant business plan template, which is a common pretext for phishing. It embeds numerous links, including one to a known malicious redirector at 'https://ttraff.cc/pify?keyword=financial+consultant+business+plan+template'. The ML classifier strongly flagged this PDF as malicious, and the presence of a link farm further indicates malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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=financial+consultant+business+plan+template
    • http://files.nadinefletcher.com/uploads/1/3/1/0/131071114/gutarogado_mesobe.pdf
    • http://files.zionnewville.org/uploads/1/3/0/8/130813899/xetivo_lezosukunonod.pdf
    • http://xunixivi.ozgurince.co/uploads/1/3/1/8/131856543/tuguzutanoxok-jafis-lutirikatenuvon.pdf
    • http://files.impunity.site/uploads/1/3/1/4/131438449/xejupufazaturiv_nuduwaxokuv.pdf
    • http://pomujabiz.chicagoyouthshakespeare.org/uploads/1/3/2/6/132683001/laxizevuwiweguj.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/2020/6758/files/nobubemupefedunuked.pdf
    • https://cdn.shopify.com/s/files/1/0427/9602/3975/files/free_autocad_viewer_for_mac_os.pdf
    • https://cdn.shopify.com/s/files/1/0432/4032/5282/files/god_eater_psp.pdf
    • https://cdn.shopify.com/s/files/1/0436/0021/6232/files/types_of_balance_of_power.pdf
    • https://cdn.shopify.com/s/files/1/0428/5900/4070/files/vepadusidomijamuxofafi.pdf
    • https://cdn.shopify.com/s/files/1/0431/7705/0272/files/87270256092.pdf
    • https://cdn.shopify.com/s/files/1/0429/9220/5978/files/jaton.pdf
    • https://cdn.shopify.com/s/files/1/0436/1139/0115/files/xujavuxobizobuxinivulusa.pdf
    • https://cdn.shopify.com/s/files/1/0429/5042/6787/files/administration_officer_cv.pdf
    • https://cdn.shopify.com/s/files/1/0433/9780/8279/files/34387878077.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_off000072c0.bin
05683e6e96eba47a99c988e6f28e3bd566b15be2f9788ecb74b9e5140c6eb464		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72C0 5076 bytes
font_01_sfnt_off000083ee.bin
0e688bc05ce4eb7120744d4dd1a4c6eeade5eaf40bf3a9cf94e2af21c353edf7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x83EE 10252 bytes

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