Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e5270e0723f83f5…

MALICIOUS

PDF

40.6 KB Created: 2020-10-29 16:11:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e3030aa4e3b7e239b34babf0eaa00217 SHA-1: 98dd5a2c7fd8e9a607afe358b7363241ad7aeb8b SHA-256: 7e5270e0723f83f53991e11f04e54bf32df3e3607e00ce558c44079e290adf9e
94 Risk Score

Malware Insights

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

The PDF contains a link that redirects to known malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains the same URL, suggesting an attempt to trick the user into clicking it. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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.link/123?keyword=guide+to+mobile+strike+on+pc
    • https://cdn-cms.f-static.net/uploads/4367920/normal_5f88097b3f5c9.pdf
    • https://cdn-cms.f-static.net/uploads/4369773/normal_5f8cb5f67fa82.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/7a8331bf-e9e1-45b7-92b6-a5f0f73be2bb/53354901403.pdf
    • https://s3.amazonaws.com/garorowa/wubaxanagovukujixa.pdf
    • https://s3.amazonaws.com/zuxadol/potaw.pdf
    • https://cdn.shopify.com/s/files/1/0430/6268/9946/files/pay_stub_format.pdf
    • https://s3.amazonaws.com/senodiw/98004060499.pdf
    • https://cdn.shopify.com/s/files/1/0431/0627/1394/files/lumefunovajutibasovemape.pdf
    • https://cdn.shopify.com/s/files/1/0496/9214/7869/files/sotefidelubusudewamo.pdf
    • https://cdn.shopify.com/s/files/1/0496/7707/4588/files/47058755136.pdf
    • https://uploads.strikinglycdn.com/files/82ad9c55-bfe9-4f91-a702-76dbd6c3eac4/92666942399.pdf
    • https://s3.amazonaws.com/nemafu/7578395372.pdf
    • https://uploads.strikinglycdn.com/files/33bf2c78-46d0-47d0-aa66-575a3e62125b/temperature_conversion_practice_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0431/4693/6482/files/wifi_mac_changer_root_apk.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_off00005fbf.bin
08c196379c7d5a0bdc1a5e82966ec0e1667e4edcc5a60588fdf57361fd355c13		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5FBF 5244 bytes
font_01_sfnt_off0000717f.bin
70f23bc78c276d48ed790cf3ade2828fa0196c8d45d43457dbedec6792e27bb4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x717F 10504 bytes

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