Malicious PDF — malware analysis report

Static analysis result for SHA-256 365c106c2d4ce5fd…

MALICIOUS

PDF

44.9 KB Created: 2020-10-16 19:18:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 384c8da47b071ccec5fdb8a22a5ee6e5 SHA-1: 12dae5b13db63779915f85f4d455cfe04d41abf7 SHA-256: 365c106c2d4ce5fd7cadf144f7fda959b0bb96c5c2daf7ca0e0fc5fcee266b82
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically pointing to 'ttraff.me'. The document body, though heavily obfuscated, contains the same URL, suggesting it's the primary lure. The presence of numerous other PDF links, identified as a 'link farm', further supports a malicious intent to redirect users to potentially harmful content.

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.me/123?keyword=vrio+framework+starbucks+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4368500/normal_5f8893921621f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366017/normal_5f872616bc2ae.pdfIn PDF document text
    • https://jufaxexave.weebly.com/uploads/1/3/0/7/130775513/d1b716f8e.pdfIn PDF document text
    • https://pigogokeda.weebly.com/uploads/1/3/1/8/131857695/3966742.pdfIn PDF document text
    • https://jezaxegare.weebly.com/uploads/1/3/1/3/131380636/5644166.pdfIn PDF document text
    • https://wedebiki.weebly.com/uploads/1/3/0/9/130969436/fe4d33f9a8b1.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://cdn.shopify.com/s/files/1/0434/1396/2908/files/daxamibudazupag.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/6656/2966/files/what_are_tertiary_intermediate_colors.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6600/7445/files/kavixuwuwiwakifoxomujamek.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/234a5dc2-530f-448f-b635-bfb93fb39f23/lifatumizozaxuzumi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/50622f02-50b3-4268-99a7-c465f67a2f0b/nunefalekolun.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2cdc20a8-5285-44d5-9634-4ad7aebc4b64/65900310004.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9082760e-195c-4597-8b35-31326af85854/19670503380.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_off000063f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63F5 5304 bytes
SHA-256: 04cca57ac77039052e848d2ea535a5b8a53806d744907bcbe2aff3abc6121ddb
font_01_sfnt_off00007612.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7612 9968 bytes
SHA-256: 305dc3076ba660fec022460de0489518daf3b3d7995ba7f21107ffde7df3f07d
font_02_sfnt_off00009833.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9833 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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