Malicious PDF — malware analysis report

Static analysis result for SHA-256 6cac107735419067…

MALICIOUS

PDF

47.6 KB Created: 2020-07-09 05:14:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fc945d2896fbf626d06197ac7d52474d SHA-1: e55b4ea81511cc959e22f10bf147575bf705172d SHA-256: 6cac1077354190678ec1bbe4ef98ee240b069b9d6b77259c994dcd016c579346
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains a large number of embedded links, many of which point to external PDF files hosted on various domains. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' indicates that at least one of these links directs to known malicious redirector infrastructure. The 'PDF_SEO_LINK_FARM' heuristic further suggests that the document is part of a link farm, likely intended to manipulate search engine rankings or distribute malicious content. No scripts were extracted from this sample.

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=marketing%204.0%20do%20tradicional%20ao%20digital%20pdf
    • http://files.elbuencacao.com/uploads/1/3/1/3/131378816/kijarekaji-mikirefefu-fixagakejavazab.pdf
    • http://files.sheep.education/uploads/1/3/0/7/130775654/fesil_morokumujudaj_vokiwufokubufov.pdf
    • http://files.laurengoldsteinart.com/uploads/1/3/1/8/131856770/leniwelowenigiweloz.pdf
    • http://files.lauramernoff.com/uploads/1/3/0/7/130775654/3cdc9bb88a09.pdf
    • http://files.agorapublications.net/uploads/1/3/2/6/132682570/4da5af8.pdf
    • http://files.savebozeman.org/uploads/1/3/1/4/131408529/80336d.pdf
    • http://files.bhmberhe.net/uploads/1/3/1/4/131407424/9c507a66dc.pdf
    • http://files.thenetworkedlibrarian.com/uploads/1/3/2/6/132681951/vepili.pdf
    • http://files.loganwhitmerlegacy.com/uploads/1/3/0/8/130873741/3ec6a3aa1a6820c.pdf
    • http://files.centaurscricket.com/uploads/1/3/1/0/131070379/f0c47e.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://kikivolepo.files.wordpress.com/2020/06/94865145256.pdf
    • https://waparujovig.files.wordpress.com/2020/07/ditiperam.pdf
    • https://rufutusizuk.files.wordpress.com/2020/06/47411676370.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/99914628395.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/87294954422.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/42539854631.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/80278007767.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/loxidunadubufurepetiverox.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/59022585862.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_off00007826.bin
caed572d3a1864a39a134495e0c8cca36ee7443148aa34cc2bf040f4d712e99c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7826 5264 bytes
font_01_sfnt_off00008a2a.bin
0a03a69325fcfe9adc74e4bde8a15c5a217a9e31e565c6f93331b51cd7301962		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8A2A 12360 bytes

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