Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d4d5d3f54f252e4…

MALICIOUS

PDF

43.8 KB Created: 2020-08-14 03:04:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d82d97e96ba7c87a1b0bf0756fcbf8d9 SHA-1: 807fa271fb3e6d1e2276d19b741e0abd58c0a199 SHA-256: 9d4d5d3f54f252e48de1eae0ab2cc2ffc84c5d927c1c04064847f5359226e927
152 Risk Score

Malware Insights

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

The PDF contains a link that redirects to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body and embedded link text suggest a lure related to spreadsheet manipulation. The PDF_SEO_LINK_FARM heuristic indicates a large number of external links, likely for SEO manipulation or to obscure the malicious redirector. The ML_NYX_PDF_MALICIOUS heuristic strongly suggests 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.cc/pify?keyword=combine+excel+spreadsheets+into+one+spreadsheet
    • http://files.automaticpocketdoor.com/uploads/1/3/0/7/130776607/97115d.pdf
    • http://files.cranageplanthire.co.uk/uploads/1/3/1/3/131398507/0d9ff4989a9953.pdf
    • http://files.orleansraks.com/uploads/1/3/0/7/130776861/1427623.pdf
    • http://zobajud.meritfinance.net/uploads/1/3/0/8/130874222/waboge-rojepofenusip-xekidili-desosali.pdf
    • https://cdn.shopify.com/s/files/1/0430/9378/6791/files/amine_and_amides.pdf
    • https://cdn.shopify.com/s/files/1/0431/2737/3990/files/aritmetik_dizi_konu_anlatm.pdf
    • https://cdn.shopify.com/s/files/1/0437/4737/7301/files/graphic_design_book_in_bangla.pdf
    • https://cdn.shopify.com/s/files/1/0434/7035/6637/files/39309231524.pdf
    • https://cdn.shopify.com/s/files/1/0433/1238/2116/files/bodybuilding_exercises_plan.pdf
    • https://cdn.shopify.com/s/files/1/0432/8367/7339/files/52978638542.pdf
    • https://cdn.shopify.com/s/files/1/0437/1690/3080/files/54664758917.pdf
    • https://cdn.shopify.com/s/files/1/0433/6936/5654/files/maplestory_2_thief_build.pdf
    • https://cdn.shopify.com/s/files/1/0434/8405/3669/files/born_not_made_the_entrepreneurial_personality.pdf
    • https://cdn.shopify.com/s/files/1/0431/6246/8514/files/tajetopilura.pdf
    • https://cdn.shopify.com/s/files/1/0431/3687/6695/files/61332274953.pdf
    • https://cdn.shopify.com/s/files/1/0429/1959/2102/files/9874642161.pdf
    • https://cdn.shopify.com/s/files/1/0433/5720/8731/files/jurup.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_off00006d04.bin
69e208ad29f93879452347b75128637af48ec90f01b25ec5acc0e4a6d5458dde		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D04 5428 bytes
font_01_sfnt_off00007f3a.bin
c8a7c0c18a53a831b3936efa7f06fd2993b49aa66e9c050427f331cd827f079e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F3A 10088 bytes

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