Malicious PDF — malware analysis report

Static analysis result for SHA-256 dfbe1981a80e0bd7…

MALICIOUS

PDF

42.3 KB Created: 2020-10-07 16:55:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: d8ba8e806dad3f14d9a61557f0cb3e67 SHA-1: b76acb5eea78f8c87e7b4d12b760b13219efad53 SHA-256: dfbe1981a80e0bd7b0a90b08fe1e1a055c21127dadaa5b0368271a6fb67a7ed1
94 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, indicating an attempt to lure the user to a harmful site. The ML classifier also flagged this PDF with high confidence. The document body, though obfuscated, contains the malicious URL, suggesting it is part of a phishing or malware delivery scheme.

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.me/pify?keyword=wintv-hvr-950q+serial+number In PDF document text
    • https://site-1039143.mozfiles.com/files/1039143/40304607670.pdfIn PDF document text
    • https://site-1048222.mozfiles.com/files/1048222/fimugozave.pdfIn PDF document text
    • https://site-1041785.mozfiles.com/files/1041785/90024568880.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/aadf3265-8d9c-46e6-875c-89698a02f347/nidagefixelisaraxet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9108b5a6-89c8-48fc-b59e-04d957f00478/lafepemorezewewemujudo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/90df6b55-6e17-475e-8961-0da490195874/17639737350.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/587efea2-d949-40a9-98f0-7b79e9579e51/34033791710.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b3d8d013-2489-4191-93e4-489437a43a6a/13326883527.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9dfa0656-b6ec-4a28-ab5f-235295d3d163/89895783677.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5d807260-9ecf-4da7-b5b2-64059f5f77b6/89406506207.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0463/3935/8882/files/31153220390.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/5973/6476/files/tadexa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3185/4247/files/ab_lounge_sport_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/9390/4545/files/2003_ap_calculus_bc_multiple_choice.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006277.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6277 5716 bytes
SHA-256: c367b0e5bf0a39c402e603e6048bb6747aaae940d8607851903d8337d4b22e76
font_01_sfnt_off000075d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x75D6 10828 bytes
SHA-256: a4a9bd82cc9d782ea2c289a5029af359c8d4c8d51bf7131137e790630e798085

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