Malicious PDF — malware analysis report

Static analysis result for SHA-256 77a641decc407c02…

MALICIOUS

PDF

88.2 KB Created: 2020-11-17 16:23:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: e815dcff204c07b184ad16841a07963b SHA-1: 97132e1a16f299d6261b06021f22b71df00b7ed0 SHA-256: 77a641decc407c02f1b36e26cab7c2b5229ec8165c19c2f529302b78b10cf2ee
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'traffking.ru'. ML classification and ClamAV also flagged this file as malicious. The embedded URL is likely used to lure the user to a phishing site or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://traffking.ru/123?utm_term=best+enneagram+test+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4381321/normal_5f8d2d5dc31cc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385012/normal_5f9a6469bdfaa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365656/normal_5f8e4b14d9c29.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381287/normal_5f9fbf5479ca5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413347/normal_5f952f552637e.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/852f2682-07bf-41e4-bebd-7849d43cb986/shogun_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/79ab850d-bb33-4497-b9f5-383b90375192/rubik_s_snake_ball.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6b04f1d3-20b6-4d25-98cc-70f89cda06f8/radunoxemutinunutugito.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e2399a16-2ed0-4a8f-8e1d-ddf5a728a102/foninobaba.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d1bb1a9-90e2-4240-a471-78c6a9f9638a/55770157071.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5a6c7619-9837-44af-93bb-f14c109228f3/occurrence_definition_cgl.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a47cc4c8-1520-4638-8b6c-e2a4f1c8906f/48763647693.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8f1a3754-6b20-4cb7-9089-d5790d4faba7/osrs_melee_training_guide_2017.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA6D 5008 bytes
SHA-256: 6e5751dad24baf5e9c2e5c650d9f85c627ea879dff1a59f22985d0ac7641db02
font_01_sfnt_off0000fb4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB4A 3220 bytes
SHA-256: 8b8148cfc80fd5c7d3235df310225dab4500da2d9906e98724d9d887acae100f
font_02_sfnt_off0001087b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1087B 11164 bytes
SHA-256: 31641f525dc06f495caaad8e37061b96a5aacb73e5ddfadf7b66fa967418e2d7
font_03_sfnt_off00012e94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E94 16116 bytes
SHA-256: afbdbd02dec82d9be1e07df9ab92004d6e2996c86bdcb9c83a2c1f8ac0d08daa
font_04_sfnt_off0001436e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1436E 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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