Malicious PDF — malware analysis report

Static analysis result for SHA-256 f78b5fbdca972311…

MALICIOUS

PDF

40.7 KB Created: 2020-10-29 19:05:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 6d91d73cf67a753b9ec25cd6484571b2 SHA-1: b757243b2b85c5c3c2a93227a2a6bd6b3910013f SHA-256: f78b5fbdca972311939d9aeb1228aad60bf6b045a8c12a36e1c908bb42f7a087
154 Risk Score

Malware Insights

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

This PDF document contains a mass of external links, including one identified as a malicious redirector. The primary malicious link, 'https://ttraff.link/123?keyword=twitch+song+request+extension', is presented as a Twitch song request extension, likely to entice clicks. The document's structure and numerous links suggest a link farm or phishing attempt designed to drive traffic to malicious 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://ttraff.link/123?keyword=twitch+song+request+extension In PDF document text
    • https://cdn-cms.f-static.net/uploads/4387408/normal_5f8e106c41ad5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415300/normal_5f95f66144b03.pdfIn PDF document text
    • https://xonuveviriniw.weebly.com/uploads/1/3/0/7/130738603/galoziwanuredi-sidofalazow.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369936/normal_5f9772a8b4103.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393220/normal_5f8f75c671e86.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409818/normal_5f9a1f772addd.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/7411/8325/files/urban_planning_dictionary.pdfIn PDF document text
    • https://s3.amazonaws.com/leguvefu/analogias_ejemplos_resueltos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/6616/2841/files/rokojowavesa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/0246/8784/files/kolijamixokadofogasivo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4564/2663/files/jiwevaxer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4688fbf5-da3e-4757-aef3-d4e800b19182/42824442895.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/6499/8043/files/relodap.pdfIn PDF document text
    • https://s3.amazonaws.com/subud/20618687635.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_off000061b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61B5 5056 bytes
SHA-256: 82fb04a07ee3520cfc9fbe2a0770aa4a40805ee5ca9435ff8377fc3c53c19c62
font_01_sfnt_off000072fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x72FC 10356 bytes
SHA-256: fb178081b22dff5d0e777cfc2f8a585ebb55a9be74f59903777b2d83155a07f8

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