Malicious PDF — malware analysis report

Static analysis result for SHA-256 5dcda9edae2e259f…

MALICIOUS

PDF

46.1 KB Created: 2020-08-04 11:06:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 606eb112b3445cb1298947612c74ff51 SHA-1: 5e55a6ed299d88c7379537657d6ecb050d53cd4e SHA-256: 5dcda9edae2e259f83048709c833f903f013f9fcd377db856e6891c0d2cac5e8
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, indicating an attempt to lead the user to harmful content. The document body, though obfuscated, contains URLs that are part of a link farm, suggesting a tactic to manipulate search engine results or distribute malicious content. The ML classifier strongly flagged this PDF as malicious, reinforcing the assessment of a malicious intent.

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/pify?keyword=canales+de+comercializacion+pdf
    • http://files.maison-lamartine.com/uploads/1/3/1/1/131164063/vugoxotode.pdf
    • http://sidemet.score-lab.net/uploads/1/3/1/0/131070356/f6c6264.pdf
    • http://files.morningmoontarot.com/uploads/1/3/1/3/131384436/vevatavedu-bolejususo-zixebumujonara-degux.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/5214/6587/files/61164751870.pdf
    • https://cdn.shopify.com/s/files/1/0431/7567/4024/files/11363196909.pdf
    • https://cdn.shopify.com/s/files/1/0440/3894/6981/files/nokajujusekopumatuganopa.pdf
    • https://cdn.shopify.com/s/files/1/0431/9281/1669/files/keurig_owners_manual.pdf
    • https://cdn.shopify.com/s/files/1/0438/4446/8901/files/3569413814.pdf
    • https://cdn.shopify.com/s/files/1/0432/0509/9675/files/lepara.pdf
    • https://cdn.shopify.com/s/files/1/0430/9850/5369/files/american_heart_association_bls_student_manual.pdf
    • https://cdn.shopify.com/s/files/1/0436/4101/2374/files/71935629878.pdf
    • https://cdn.shopify.com/s/files/1/0433/2525/9944/files/lesodutuwewanotikezirorid.pdf
    • https://cdn.shopify.com/s/files/1/0440/7610/5893/files/lambda_fortress_2.pdf
    • https://cdn.shopify.com/s/files/1/0433/4885/2894/files/jay_z_anything.pdf
    • https://cdn.shopify.com/s/files/1/0431/7229/8913/files/vanoxew.pdf
    • https://cdn.shopify.com/s/files/1/0430/3847/4397/files/ripaxejak.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_off0000746c.bin
b605d51c427f6381bd3aa4c3133bb817505877c12b9de93085a1c97cf7f460ee		 pdf-font-stream PDF embedded font (sfnt) at offset 0x746C 5256 bytes
font_01_sfnt_off0000863a.bin
de73218f7fd5c2bb56aeb16deaa59eb646e6f5744787510e739f8d05b74c8b8c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x863A 11124 bytes

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