Malicious PDF — malware analysis report

Static analysis result for SHA-256 64152a66881c2fe7…

MALICIOUS

PDF

42.3 KB Created: 2020-07-08 16:53:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 78fede702dac653d6fe72c4576499d3b SHA-1: c27f66f6b72d62efe17a2feeefdcf635ee4900cf SHA-256: 64152a66881c2fe7e200cbb6ea922b7d0507a06518025b66839539d92379f279
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF contains a large number of embedded links, identified as a PDF link farm, with one pointing to a known malicious redirector. The document body, though heavily obfuscated, also contains URLs. The primary function appears to be directing users to external, potentially malicious, websites.

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/wb?keyword=kruppel%20engel%20summary%20in%20english%20pdf
    • http://files.jfreconsulting.com/uploads/1/3/1/6/131636914/lidezituvegizimoz.pdf
    • http://files.anniepercussion.com/uploads/1/3/2/7/132740321/disatibe.pdf
    • http://files.smarttournaments.com/uploads/1/3/1/6/131606674/sodipubulegevofikuze.pdf
    • http://files.spacemontrose.com/uploads/1/3/0/7/130775744/9035805.pdf
    • http://files.orangehistory.org/uploads/1/3/1/3/131380998/6a7d3c8e67aa6.pdf
    • http://files.cisdfoundation.org/uploads/1/3/0/8/130873830/60d3933a79277c.pdf
    • http://files.nlg-pros.com/uploads/1/3/0/9/130969910/katixiratowapo.pdf
    • http://files.monasfamilyemporium.com/uploads/1/3/0/8/130873895/2420688e779a2.pdf
    • http://files.willowwildedges.com/uploads/1/3/1/8/131856443/xukopiwome-tojazelapiz-kasivezobisu-sunezurawuse.pdf
    • http://files.samtoth.com/uploads/1/3/1/6/131606550/dazigasaguzo.pdf
    • http://files.becomingsarh.com/uploads/1/3/0/7/130739567/3400932.pdf
    • http://files.yunkawasiperu.org/uploads/1/3/1/3/131379612/vizarifogumawov.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://vosameruki.files.wordpress.com/2020/07/jigir.pdf
    • https://nogutomat.files.wordpress.com/2020/07/jivuve.pdf
    • https://rewanuzagi.files.wordpress.com/2020/06/noxotabasugatel.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/4155504299.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/48054684450.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/76588695657.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/dobemajafapurotexujebo.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/98559129476.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_off00006841.bin
61b72899606979a114814ea34e1173d2b4668be36ef28f608385d70236da50cf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6841 5220 bytes
font_01_sfnt_off000079d2.bin
49772ceeee3d5b504e2f6c35e7a830cc943d0b4e743331b3837be30b7e3f89ce		 pdf-font-stream PDF embedded font (sfnt) at offset 0x79D2 10352 bytes

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