Malicious PDF — malware analysis report

Static analysis result for SHA-256 87ba4400879e5155…

MALICIOUS

PDF

68.5 KB Created: 2020-11-30 11:42:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: d47cab70c4966085e351a41b8dd91184 SHA-1: d770aefd27338677b106988cfbaa785158c93c4f SHA-256: 87ba4400879e5155fd4c5e79e253d8bde4f36d27cfb74eaa4942416af44535ae
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'. This URL is the primary indicator of malicious intent. The ML classifier and ClamAV detection further support the malicious nature of the file, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://traffking.ru/strik?utm_term=arizona+diamondbacks+all+you+can+eat+seats In PDF document text
    • https://cdn-cms.f-static.net/uploads/4463807/normal_5fb9414fdceaf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc0c9b1a5bc066edfa528b7/t/5fc3abede6d49a06bb02a14e/1606659054136/27668152780.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0ea21c30a162e0c52977d/t/5fc2615d08845d0924d7134f/1606574431992/emmy_ann_wooding.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0f6bd5687f52b6b817d01/t/5fc13e2dbc819f1cf405871a/1606499886132/tekak.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/450593a7-0a72-48cf-8517-f01ca9d92265/mega_man_dr._wilys_revenge.pdfIn PDF document text
    • https://s3.amazonaws.com/xotomisen/80734798887.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc29fd4c14dfd36fefc97f1/t/5fc432553c6ccf69f3e3d496/1606693466046/ranidofu.pdfIn PDF document text
    • https://s3.amazonaws.com/temujonuwu/teddy_bear_names_template.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf4f9fcb3e0f577146045b/1606373310980/46411946448.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0c9c111f6a41984851340/t/5fc4ab00f81c9a2a0c3630bc/1606724353735/rulagenenufed.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf5c172dd96f5918e62ce7/1606376472194/domain_and_range_of_a_function_worksheet_kuta.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_off0000ce6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE6E 5428 bytes
SHA-256: 45e4c1575f75d668d46b3b8e38a40fe517949c6c8fea91925c0602f8345ceed2
font_01_sfnt_off0000e0dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0DD 10720 bytes
SHA-256: 0f960facab13de9ca993b45d502351f7d402d61bab3116144fb2a8827b56b9f5

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