Malicious PDF — malware analysis report

Static analysis result for SHA-256 8355c73233beebf6…

MALICIOUS

PDF

61.0 KB Created: 2020-12-23 12:41:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 9e227deedd350fca3b9b6679dcd2624e SHA-1: b3c2181d5334201ee13842db033154c2e0495a53 SHA-256: 8355c73233beebf6adf9de3e49eb3e0c8aa555cc5f33242156bdaac05e7a636e
94 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link pointing to 'ggtraff.ru'. The ML classifier also flagged this PDF with high confidence. While no scripts were extracted, the presence of a malicious URL strongly suggests an attempt to lure the user to a harmful site, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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/strik?utm_term=general+grievous+meme+collection In PDF document text
    • https://cdn-cms.f-static.net/uploads/4470968/normal_5fd9013b5bfac.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412195/normal_5fbe932d99c47.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427820/normal_5fb7668d43060.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420454/normal_5fd6328de7e56.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/garorowa/th8321wf1001_installation_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0990ab8e-cf17-4ec4-9beb-ca8dd6e607f3/lipowadosev.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/566534d3-2416-4c9a-813f-a54194071c1e/badodamevomokawanivoba.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1faa5101-bfbe-4382-8312-093ad9febbe4/butasidalesajimivinerebor.pdfIn PDF document text
    • https://s3.amazonaws.com/fowikorejodi/gettysburg_address_questions_and_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd4fd313-f718-4c6d-a3dd-d802bec3a79b/parchment_background_word.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9654f2fc-f91f-4149-bf5e-eb84b4a56b97/zebedelevinebuvanu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/77e3e429-fd5c-4b56-bdde-ebe52824cbb4/jepexabew.pdfIn PDF document text
    • https://s3.amazonaws.com/mulerux/revenge_of_the_sith_free_reddit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8124d533-13f3-427b-92df-eb7143921325/bulemunofosuterew.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_off0000b59c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB59C 5212 bytes
SHA-256: 94b81cca28d2e4c59ab7ac49e7ad8364d9d22afd44adfb759fe2be4105601118
font_01_sfnt_off0000c74a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC74A 9440 bytes
SHA-256: 55fff78f73bf2c5b8668da1f4bdbb1090f47883a0ee45c7d2d347ef63b3e85d3

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