Malicious PDF — malware analysis report

Static analysis result for SHA-256 09ae6ca85462433e…

MALICIOUS

PDF

127.2 KB Created: 2020-07-20 03:48:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5e3152301bc38643e12b0beac548c34a SHA-1: 67a5a164f7cb6733460ef2c417d2ec4bc4ffc12a SHA-256: 09ae6ca85462433efcf94f68ceca6449fc4ca80df2d55dc622eb1b1c4ddede50
154 Risk Score

Malware Insights

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

This PDF document contains numerous embedded links, with one specifically pointing to a known malicious redirector. The ML classifier also strongly indicated maliciousness. The document's structure and embedded links suggest it is part of a link farm or phishing campaign designed to redirect users to malicious infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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/wb?keyword=delphi%20language%20guide%20pdf
    • http://files.dakotadesigns.net/uploads/1/3/0/7/130740493/jilakeveluked_nerewezidijabuf_zirite.pdf
    • http://files.sfa-am.ch/uploads/1/3/1/3/131384135/wolekidadabo.pdf
    • http://files.theamaniconsort.com/uploads/1/3/0/8/130813923/zurudumimukedaboku.pdf
    • http://files.ch8sapscience.com/uploads/1/3/1/8/131856331/9116327.pdf
    • http://files.bloomfieldhillsskiteam.com/uploads/1/3/0/7/130776728/429f9498f.pdf
    • http://files.voiceofjonescounty.com/uploads/1/3/0/8/130873965/68b928e756.pdf
    • http://files.katiefrenchbooks.com/uploads/1/3/0/7/130775221/422b3d9ea54bf.pdf
    • http://files.mirkesinsurance.com/uploads/1/3/1/6/131637477/5542630.pdf
    • http://files.graceacuherbs.com/uploads/1/3/0/7/130775292/kumijev_nuvirikew.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://bozuveser406651832.files.wordpress.com/2020/07/somufuxijixivokinoge.pdf
    • https://jezalur.files.wordpress.com/2020/07/53987863174.pdf
    • https://losokud.files.wordpress.com/2020/07/kesixamimukukonodowa.pdf
    • https://sirupipes.files.wordpress.com/2020/07/94507186813.pdf
    • https://cdn.shopify.com/s/files/1/0430/4571/6129/files/32199935978.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mirizopenifipometetotagoz.pdf
    • https://cdn.shopify.com/s/files/1/0430/2523/6121/files/9713427839.pdf
    • https://cdn.shopify.com/s/files/1/0432/0994/9341/files/6912246670.pdf
    • https://cdn.shopify.com/s/files/1/0430/8205/5842/files/putimuxolegut.pdf
    • https://cdn.shopify.com/s/files/1/0434/3706/4354/files/wiwivesutezurapinukugi.pdf
    • https://cdn.shopify.com/s/files/1/0431/0709/0581/files/wojez.pdf
    • https://cdn.shopify.com/s/files/1/0433/8080/1701/files/wulodagame.pdf
    • https://cdn.shopify.com/s/files/1/0430/7379/8306/files/nejesulo.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_off0001af12.bin
1db0b7d5ba8e11f1e9f4d55e3898b221cba4891dff1dea1553f986e4e6b17695		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1AF12 4720 bytes
font_01_sfnt_off0001bf10.bin
b4dc2259b1e180d9717c722ba7191a06e1c582ea7a869aef6d0143c8cef0cf66		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1BF10 15368 bytes

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