Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d6321ff22b4a44f…

MALICIOUS

PDF

77.4 KB Created: 2020-12-19 12:36:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 74f8e14e32875499b2b8ad0917c02b27 SHA-1: de8f58c2eb5704d6bd1755488662765be620959a SHA-256: 9d6321ff22b4a44fcbd76ab118b6e2174cd08211595a62540d86974dd04bc417
154 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical alert for linking to known malicious redirector infrastructure. The ML classifier also assigned a high probability of maliciousness. The embedded URL, https://gettraff.ru/aws?utm_term=postman+in+ubuntu+terminal, is the primary indicator of malicious intent, likely serving as a lure for phishing or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://gettraff.ru/aws?utm_term=postman+in+ubuntu+terminal In PDF document text
    • https://cdn-cms.f-static.net/uploads/4502870/normal_5fd27a6748a84.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420018/normal_5f969d0da8f06.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/fd87b6ac-9c4c-41b0-bd5d-9df89889514f/revarakudivi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e1cc14ae-1de8-4096-8104-85b8e3ce5660/90356849817.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fdc7d509de11a3bcb749b5f/t/5fdcfb698f6511759101a8f0/1608317804293/vubusixipetakexolujiboj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/049cef73-68e2-42a6-ba37-d187c73ae2f8/cleveland_high_school_nc_basketball_schedule.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd030ccc750a3b5a07033a/1606222606475/vexubep.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fdd525e5b7bc966055e3a6f/t/5fddaffefb7de13a64484530/1608364030510/vadiwemilez.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fc8afed8-ef67-4888-a695-48c2b0c23f35/san_francisco_garter_snake.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fdd2b976394b41d6424bdfb/t/5fdda59cf23a830a59985884/1608361373508/62107073210.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e761a3d-ab06-4f9f-acf1-864a29adf520/riwekapanan.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cd74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD74 4852 bytes
SHA-256: e3e34196f23ae9702d09726591d2f1f3cf1a7875fb452b6c09e88276535bedfd
font_01_sfnt_off0000ddcb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDCB 11556 bytes
SHA-256: ceca97267c8f0db138c47bccdc8fb942792fbd896f19b2726b4aae101e50846b
font_02_sfnt_off0001054b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1054B 16140 bytes
SHA-256: 5bfda07072dd2e1b0df7f1680a75ba616774ec51e1a09c257f000ba239241e1c
font_03_sfnt_off00011a47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A47 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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