Malicious PDF — malware analysis report

Static analysis result for SHA-256 f25e8e31495a1c4f…

MALICIOUS

PDF

40.8 KB Created: 2020-08-09 01:46:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f66c91c32d43150859f6ab4ff8abaac7 SHA-1: 763434030be9285f3c05c32e029455b1426f8fcd SHA-256: f25e8e31495a1c4f281780c4653f08e51c48896455b36fdd1522f178dfcef76f
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains embedded links that redirect to malicious infrastructure, specifically a URL related to 'brain cancer causes'. The heuristic firings indicate the PDF is a malicious redirector and part of a link farm, suggesting a phishing or scam attempt. The ML classifier strongly supports the malicious nature of the document.

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=brain+cancer+causes+pdf
    • http://tafise.storywings.net/uploads/1/3/1/3/131383651/wuxukujoxa.pdf
    • http://files.mainhomeconstruction.com/uploads/1/3/1/3/131383613/wudanutul_zijiniki_gulavuvetuzulud_nuxoba.pdf
    • http://files.cruisencocktails.com/uploads/1/3/2/6/132681954/4988569.pdf
    • http://files.pathpointstowellness.com/uploads/1/3/1/4/131406181/4047870.pdf
    • http://files.schwarzgoldce.org/uploads/1/3/0/7/130739182/5415277.pdf
    • https://cdn.shopify.com/s/files/1/0431/5706/1788/files/gesojowalaxazoduban.pdf
    • https://cdn.shopify.com/s/files/1/0435/0833/4744/files/lirulegolugixikis.pdf
    • https://cdn.shopify.com/s/files/1/0431/1079/3382/files/zovin.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/sarozasupevukofapunaxovu.pdf
    • https://cdn.shopify.com/s/files/1/0429/2814/4543/files/10752567420.pdf
    • https://cdn.shopify.com/s/files/1/0429/3407/5558/files/luguwinenerabixutitumik.pdf
    • https://cdn.shopify.com/s/files/1/0438/5295/5810/files/tu_cerebro_creativo_shelley_carson_descargar.pdf
    • https://cdn.shopify.com/s/files/1/0432/1250/5252/files/80649411124.pdf
    • https://cdn.shopify.com/s/files/1/0434/0567/2597/files/cultivo_de_bivalvos.pdf
    • https://cdn.shopify.com/s/files/1/0440/2796/9686/files/22036849728.pdf
    • https://cdn.shopify.com/s/files/1/0435/5801/1035/files/24293135675.pdf
    • https://cdn.shopify.com/s/files/1/0431/9258/2293/files/30027377850.pdf
    • https://cdn.shopify.com/s/files/1/0429/9004/3285/files/ranopijekukaju.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000628e.bin
e55f4f872742f0e766937d9f7ec6be92b1149a2420122886a9e097fcb0968832		 pdf-font-stream PDF embedded font (sfnt) at offset 0x628E 5164 bytes
font_01_sfnt_off0000742d.bin
bb1566d3d6ea3ce22cf2ff1c5eaecf8c6cddecf7a17fc52c71e137f2dd997c37		 pdf-font-stream PDF embedded font (sfnt) at offset 0x742D 10076 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.