Malicious PDF — malware analysis report

Static analysis result for SHA-256 651c04c43bf7524c…

MALICIOUS

PDF

38.3 KB Created: 2020-11-03 16:29:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 56f5e9353587214f3dcb640e0821781e SHA-1: 1dc940d5f0960f3cef562fc149841a1291d52e8b SHA-256: 651c04c43bf7524c0c8489b2e8ebad449356c0666ca75b3df795679dfa239cd6
94 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing indicating a malicious redirector link to 'https://ttraff.ru/123?keyword=the+standard+fire+insurance+company+fax'. The ML classifier also strongly flagged this PDF as malicious. While no scripts were extracted, the presence of a malicious URL within the document body strongly suggests an attempt to lure the user to a harmful site, consistent with phishing or malware delivery.

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.ru/123?keyword=the+standard+fire+insurance+company+fax In PDF document text
    • https://cdn-cms.f-static.net/uploads/4421943/normal_5f98fa10d321b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378165/normal_5f8e9b3239154.pdfIn PDF document text
    • https://luwobidope.weebly.com/uploads/1/3/0/8/130814225/6442210.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375896/normal_5f8d133dbcc6b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365612/normal_5f8d17632e4c4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385863/normal_5f994565453d8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365540/normal_5f8f32dd4bb30.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365619/normal_5f87031b236ed.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/abcba827-e21a-43c3-9ca0-838e14e3459a/the_nest_thermostat_troubleshooting.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files/14814645504.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2d7625c1-5052-45f0-ad96-d98477d9eedd/bcmon_apk_mirror.pdfIn PDF document text
    • https://s3.amazonaws.com/susonanezaj/64191536238.pdfIn PDF document text
    • https://s3.amazonaws.com/liwafo/joanna_russ_when_it_changed.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_off00004cd7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4CD7 5364 bytes
SHA-256: d2817b5e3aaee295e843bbae49bda46730d741d7b7e7dd3c4f0b63499da11d11
font_01_sfnt_off00005ee6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5EE6 9144 bytes
SHA-256: aa3e59457f275ab7c0357d2a29ac7d2fcc5778be0157e5ff06f11dace2ad0141
font_02_sfnt_off00007e2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E2F 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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