Malicious PDF — malware analysis report

Static analysis result for SHA-256 5aa3cab42e4f4147…

MALICIOUS

PDF

67.2 KB Created: 2020-12-15 00:11:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: d11cf46905126755ca32ac28fbe1b217 SHA-1: 1bca7d2d81747123cbb79fdb0cd2d07bba1cae78 SHA-256: 5aa3cab42e4f414723cbf44af54de9432917dbb955bec745a21d3be1c681e15b
214 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'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs leading to other PDFs. The ML classifier and ClamAV detection strongly indicate maliciousness, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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=ninja+ultima+blender+owner%2527s+manual In PDF document text
    • https://cdn-cms.f-static.net/uploads/4446770/normal_5fb2a79611c29.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4499309/normal_5fc0e61631d66.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460970/normal_5fd7e2e61fb93.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454824/normal_5fa852a80846a.pdfIn PDF document text
    • https://tubenuluni.weebly.com/uploads/1/3/1/4/131437864/2022436.pdfIn PDF document text
    • https://rajerese.weebly.com/uploads/1/3/4/3/134387708/5155586.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/5fc58f90b8467722f1f3741f/t/5fd1e984b0f0f842d7a92817/1607592325753/11090469155.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0e5b8a3bf4b14aba92f9c/t/5fc17b55173fb5383bdae05c/1606515542098/fapupuzuwezezilamirujew.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc285ac5e8e827d42982ab0/t/5fcd36f605ddc9599d2cbb05/1607284478112/34100825308.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a36f9a48-5f2c-48b9-a7a4-90f47243e25e/google_home_widget.pdfIn PDF document text
    • https://s3.amazonaws.com/nademopor/15702326631.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc37bc8c30a162e0c62db62/t/5fc892c98eecd53e39ee58d7/1606980299842/800_words_season_4_start_date_usa.pdfIn PDF document text
    • https://s3.amazonaws.com/pozokimepe/50764368423.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5693fbe9b693951291b9c/t/5fcbaad89d29b56e4d0739f6/1607183064842/prime_video_android_tv_apk_4._8._69.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5fe01169-e811-4475-b8c8-a2106deef291/18_and_over_near_me.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_off0000c73f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC73F 5284 bytes
SHA-256: bf82122b70db8040367595a74cc54b977cb81b0cdda34f1a701de722c1885855
font_01_sfnt_off0000d935.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD935 11060 bytes
SHA-256: 0559dca7e8d02cb811c1bd4403bf9387c66c29b5580e137479427ee5d6ff73d8

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