Malicious PDF — malware analysis report

Static analysis result for SHA-256 3dececcdf55a5e4d…

MALICIOUS

PDF

77.8 KB Created: 2020-12-27 02:17:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 6addea0931d3fdf613703e596e368fdc SHA-1: b9ff64920ff8e22532998d390a51044d92b5fd5c SHA-256: 3dececcdf55a5e4dab7c8f9e5f73053f33ad542c259b0bba308f34a0752166ac
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 presented to the user as a download for an 'iphone keyboard apk ios 11', indicating a phishing or social engineering lure. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the presence of a malicious URL is sufficient to infer a phishing attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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=iphone+keyboard+apk+ios+11 In PDF document text
    • https://static.s123-cdn-static.com/uploads/4379613/normal_5fdd697001982.pdfIn PDF document text
    • https://cdn.sqhk.co/tipefimex/gg8ighf/jivevomigujo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402932/normal_5fa90c2883e4b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408476/normal_5fad5afd76a59.pdfIn PDF document text
    • https://cdn.sqhk.co/duzokezubeka/sphjKhc/science_lab_safety_equipment.pdfIn PDF document text
    • https://cdn.sqhk.co/zepagaro/4I157ie/free_fonts_for_cricut_maker.pdfIn PDF document text
    • https://cdn.sqhk.co/xuvomuvugu/aJVibUX/playstation_5_best_buy_cyber_monday.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416661/normal_5f9de1a1eb691.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490252/normal_5faa00b73dc3e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365600/normal_5f870624a85ad.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/zasepo/devanuzazoku.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_off0000ce92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE92 2900 bytes
SHA-256: b3dfb2f2c41da7350fc3755141d2fd0ea5796bb125df25fec831093623ff73df
font_01_sfnt_off0000d8d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8D5 5312 bytes
SHA-256: c10154619d2d85eb57ff04df4b41336b0f89186e1b96ace33ea2b3c19b378055
font_02_sfnt_off0000eadb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEADB 11140 bytes
SHA-256: ae1fdb396eca915385dc805bf912ccbd806fe96a80e0a8db09dfe32343adba3d
font_03_sfnt_off000110dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110DC 17188 bytes
SHA-256: c63115babf261caf11188345e41a9810a2a3ec4874b53f08b325a858dc9f0c3f

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