Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0d0765fafbe91ca…

MALICIOUS

PDF

46.8 KB Created: 2020-08-19 10:39:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d892532af8686d2441d4200e09143d09 SHA-1: 37a8c8926c3dacc93f85b6969ec79a8736de0654 SHA-256: d0d0765fafbe91ca2664e1e6980449b990e7f3548d05d0ac8fb643166b13c058
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious File

The PDF contains a large number of embedded links, with one critical heuristic firing indicating it links to known malicious redirector infrastructure. Another critical heuristic identifies it as a PDF link farm, with many external PDF links. The ML classifier also flagged this PDF as malicious. The embedded URL 'https://ttraff.com/pify?keyword=contoh+teks+report+bahasa+inggris+panjang' is likely used to redirect the user to malicious content or a phishing page.

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=contoh+teks+report+bahasa+inggris+panjang
    • http://files.marthalindsell.com/uploads/1/3/0/8/130874197/4629310.pdf
    • http://wapini.cpscdurhamyouthprograms.com/uploads/1/3/0/8/130874524/lugokoxidexe_rixotofawaba_vuzolu_gisowu.pdf
    • https://cdn.shopify.com/s/files/1/0437/3181/2504/files/adjetivos_calificativos_en_espaol.pdf
    • https://cdn.shopify.com/s/files/1/0429/5730/8063/files/xazomofadeterujilijute.pdf
    • https://cdn.shopify.com/s/files/1/0434/0708/1622/files/32676755047.pdf
    • https://cdn.shopify.com/s/files/1/0435/0682/7428/files/rajovedizixi.pdf
    • https://cdn.shopify.com/s/files/1/0431/7832/8221/files/39919754558.pdf
    • https://cdn.shopify.com/s/files/1/0435/6702/2239/files/lozaxo.pdf
    • https://cdn.shopify.com/s/files/1/0428/9386/9223/files/accounting_information_system_free_download.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_off00007a3c.bin
9d3f80e520cd87f1689e671075547f28498ffddb13d30f15030feddfc9ca0e63		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A3C 5236 bytes
font_01_sfnt_off00008c01.bin
fad2e8616d086ef8096ee1543cc0ac5b26e832a2ccd6950d057a5544a00a174a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8C01 10192 bytes

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