Malicious PDF — malware analysis report

Static analysis result for SHA-256 4087ca0965d96b3d…

MALICIOUS

PDF

41.7 KB Created: 2020-10-29 23:35:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 9130f9a8a4101445b2c57170660f2932 SHA-1: 61c332f46aac4af98a379da963f35e65e5890d3a SHA-256: 4087ca0965d96b3dfef898ad39686acf51b226a2c4dbe34790dfd05735c43cc3
94 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing indicating it links to known malicious redirector infrastructure. The embedded URL, https://ggtraff.ru/aws?keyword=things+to+do+in+topsail+nc+when+it+rains, is the primary indicator of malicious intent. While no scripts were extracted, the PDF structure and the presence of a malicious URL strongly suggest a phishing or malware delivery attempt, likely delivered as a spearphishing attachment.

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://ggtraff.ru/aws?keyword=things+to+do+in+topsail+nc+when+it+rains In PDF document text
    • https://cdn-cms.f-static.net/uploads/4371005/normal_5f92727b39eb8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366343/normal_5f880913d65d2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414336/normal_5f98fae7dfaec.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365612/normal_5f89116d29d94.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/ec7e247a-06f7-488a-af61-c83549383059/71469792344.pdfIn PDF document text
    • https://s3.amazonaws.com/dutimajizowa/39734497957.pdfIn PDF document text
    • https://s3.amazonaws.com/napisakaluja/rutopofofukozisasemaz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/2250/6913/files/nevuporo.pdfIn PDF document text
    • https://s3.amazonaws.com/degagaziv/dark_matter_and_dark_energy_book.pdfIn PDF document text
    • https://s3.amazonaws.com/wilugugo/vuwosezatezopizegef.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c9bea797-8b90-44c4-a6f1-f9bdd7833af5/low_dose_naltrexone_empty_stomach.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8048/1954/files/image_slide_android_studio.pdfIn PDF document text
    • https://s3.amazonaws.com/sorogamat/reliance_501_hot_water_heater_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/8049/4485/files/sinorefijitiporigewajeri.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000055ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x55AC 5164 bytes
SHA-256: b379c33f5620e88719d574315108da9238bf2662fe29f34cd2ecf5bea60d3fa5
font_01_sfnt_off0000673d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x673D 10704 bytes
SHA-256: eae8794772380239c97a918fe6b3c18f80da6d1b5e232a4dec49833b17385ed8
font_02_sfnt_off00008bab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8BAB 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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