Malicious PDF — malware analysis report

Static analysis result for SHA-256 d49fe6fa9bec9667…

MALICIOUS

PDF

61.0 KB Created: 2020-08-25 07:16:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 20b03eb65402d01d07bbe0db97627862 SHA-1: 3ced805158850f637c11a2b11001611d84d5b7c1 SHA-256: d49fe6fa9bec9667a29af78568fab92adf34c663d71435d9d4467a1735033d74
154 Risk Score

Malware Insights

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

The PDF contains numerous links, including one pointing to a known malicious redirector at 'ttraff.com'. The document body, though heavily obfuscated, appears to contain the URL 'https://ttraff.com/pify?keyword=autonomic+nervous+system+physiology+pdf', suggesting a lure to a malicious site. The ML classifier strongly indicated maliciousness, and the presence of a link farm further supports a malicious intent, likely for phishing or malware distribution.

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=autonomic+nervous+system+physiology+pdf
    • http://files.tnlsfranklin.com/uploads/1/3/2/3/132302858/rukedifajor-juxufemakeziwu.pdf
    • http://files.ricepaperdesigns.com/uploads/1/3/1/4/131438044/dobebogobev_nonopir_potiji_dufelil.pdf
    • https://cdn.shopify.com/s/files/1/0434/4279/8757/files/fawexevonoxotojopanel.pdf
    • https://cdn.shopify.com/s/files/1/0436/4907/3312/files/xuwaxijafuv.pdf
    • https://cdn.shopify.com/s/files/1/0437/3898/8709/files/30693969404.pdf
    • https://cdn.shopify.com/s/files/1/0437/7490/2423/files/48946555712.pdf
    • https://cdn.shopify.com/s/files/1/0430/7540/3936/files/mewoxiruwekazo.pdf
    • https://cdn.shopify.com/s/files/1/0437/2961/7057/files/wiwapononu.pdf
    • https://cdn.shopify.com/s/files/1/0431/8940/3810/files/dudewagi.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/72710717911.pdf
    • https://cdn.shopify.com/s/files/1/0432/3577/0535/files/wegidosikal.pdf
    • https://cdn.shopify.com/s/files/1/0428/7266/8319/files/brian_tracy_sales_superstar.pdf
    • https://cdn.shopify.com/s/files/1/0463/7337/2059/files/47490109290.pdf
    • https://cdn.shopify.com/s/files/1/0428/8220/3801/files/46683736808.pdf
    • https://cdn.shopify.com/s/files/1/0437/2715/9445/files/facebook_for_pc_windows_10.pdf
    • https://cdn.shopify.com/s/files/1/0433/4492/0734/files/como_hacer_un_articulo_de_opinion.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009ad9.bin
3b4a5ba85c1f79949a37fbc031186d6975469a03bf580c5535d1ea9140f52ecc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9AD9 5392 bytes
font_01_sfnt_off0000ad14.bin
6f168993dfee1d9eee2fa54bc7d1f7a9a103371240f19d04f41d9f9214029a52		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAD14 14016 bytes
font_02_sfnt_off0000d8ff.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD8FF 4324 bytes

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