Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f9640b189da9f23…

MALICIOUS

PDF

41.9 KB Created: 2020-07-09 23:22:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6dabb563d49c184861091c74a57870e8 SHA-1: b719ee77fa2e4638f4d7eaea48e0ba093d1c406c SHA-256: 5f9640b189da9f23f712e061c646e56599df8e63e60ea2e410372b69ebee1072
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, including one pointing to a known malicious redirector, designed to lead users to potentially harmful websites. The document body and embedded links suggest a lure related to online document conversion or search, likely intended to trick users into visiting malicious infrastructure. No scripts were extracted, but the presence of many external links indicates a phishing or content-luring attack pattern.

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/wb?keyword=doi%20file%20pdf%20sang%20word%20online
    • http://files.seekerseyecomics.com/uploads/1/3/1/4/131409909/589949.pdf
    • http://files.spangledbanner.net/uploads/1/3/0/7/130739662/pinorezad-fonapinip.pdf
    • http://files.fryeins.com/uploads/1/3/2/6/132681448/zemoxinujevubo.pdf
    • http://files.wealthbeyondwords.org/uploads/1/3/1/0/131070481/5545297.pdf
    • http://files.creeksideband.com/uploads/1/3/1/3/131384789/3301404.pdf
    • http://files.cpyachtsales.com/uploads/1/3/1/3/131383860/davifibiveni_fifojagez_sijepesopujuviz.pdf
    • http://files.bottlecapmultimedia.com/uploads/1/3/0/8/130813614/juwivopolep-rimasapof-zugewobaliropel.pdf
    • http://files.surrenderedtochrist.org/uploads/1/3/2/6/132681656/wulegi.pdf
    • http://files.hiddenoakshoa.org/uploads/1/3/1/4/131453299/sapavagom.pdf
    • http://files.msmerg.com/uploads/1/3/1/4/131410485/a991e3.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://vifilajezuro.files.wordpress.com/2020/06/xoxojolopip.pdf
    • https://riwuvot.files.wordpress.com/2020/07/92175805830.pdf
    • https://diwilawewev.files.wordpress.com/2020/06/90637608385.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/39646295774.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/87960197539.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/fodafozisejuleluz.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/89349082521.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zejakepujubuk.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/1885060089.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_off0000672f.bin
bd705cd7355fb69ccae68d696fd4ed55a445439082203b1c00c04df0d001cba8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x672F 5008 bytes
font_01_sfnt_off00007855.bin
64e9166ad3647e6bc3bc8864292fcd72d29cf01cd6051323c837df270537968a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7855 9996 bytes

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