Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f691621cb5ff319…

MALICIOUS

PDF

43.1 KB Created: 2020-11-01 22:05:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 0dd52072f649ccb894e6e0c54c00a93f SHA-1: 501147567288659c771c79f2656edd6489f033d4 SHA-256: 7f691621cb5ff3195ce407bc186e8bd8fe89beae2f0d9aa1d64f98f1d5c73e37
154 Risk Score

Malware Insights

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

This PDF document contains embedded links, with one specifically pointing to a known malicious redirector. The document body text, though garbled, includes the string 'Roku. com sign-in', suggesting a phishing lure. The presence of numerous external PDF links, many hosted on cloud storage, indicates a link farm designed to distribute malicious content or redirect users to phishing sites.

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://ggtraff.ru/wb?keyword=roku.%20com%20sign-in In PDF document text
    • https://cdn-cms.f-static.net/uploads/4417122/normal_5f95dda01b057.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367648/normal_5f8e103f1d448.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403117/normal_5f9c4d8d6cc00.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/905079e9-86da-40d7-8d9e-c5eef5bbcd8b/82712448034.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd336351-347f-416f-ba90-fdbbb9817448/59691916289.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8748/5342/files/87565141311.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e9435c87-587a-45c7-948a-bcd892178b22/14675381247.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/22b157ea-fe55-4261-9801-73cbf03563a4/best_youth_bats_2016.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxadol/jipemejofopifufem.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb267728-9b86-47b2-99c9-30c57283c0ed/lapuluwakajuvamadu.pdfIn PDF document text
    • https://s3.amazonaws.com/radaruropivoje/87681790484.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_off00006c37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C37 4916 bytes
SHA-256: 0b02ca3f6882a7a473f161acbb80979cc2f726aa424f1b170c2e14abaf8d2157
font_01_sfnt_off00007cfe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7CFE 10464 bytes
SHA-256: 4b3e69d6119257e01056dfbe020d7f921d22c3efb3e11ad857f1433e1792a29c

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