Malicious PDF — malware analysis report

Static analysis result for SHA-256 03935e21af6e74cd…

MALICIOUS

PDF

71.3 KB Created: 2020-12-17 20:51:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 52e78a2f2f506c70da4d73374517e19a SHA-1: 7bd5404825defadd22eda0e45c019e469eb6ddc9 SHA-256: 03935e21af6e74cda9b6b123c750d6e147d90aa00692ab445f506ef963aec0b5
214 Risk Score

Malware Insights

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

This PDF file was identified as malicious by multiple heuristics and a machine learning classifier, specifically flagged as a redirector link and a link farm. The embedded content, though heavily obfuscated, suggests an attempt to direct users to external URLs, with one critical finding pointing to the redirector at 'traffking.ru'. The presence of numerous PDF links indicates a potential phishing or SEO manipulation scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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=hot+wheels+4+lane+raceway+walmart In PDF document text
    • https://rimofunoduw.weebly.com/uploads/1/3/4/5/134525219/5fa3ba2975f2674.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379964/normal_5fd329385e28c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374951/normal_5fba51bd314f4.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/risisipajole/buzipejex.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e36628d-de5c-4760-bc24-7d8e6ad3220d/46254228500.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/645b28cb-9b73-4840-8c5a-d08afb828860/kunosasozotarejetudejefo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9a90af90-f86e-4fc4-898e-1232a08307a2/benaw.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files/camera_lenses_for_dummies.pdfIn PDF document text
    • https://s3.amazonaws.com/lomiwexuva/informal_letter_english_camp.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0f79e2e34347c7044618a/t/5fce87af3c1f644c04621ac7/1607370672182/zuvekijunuxijuzimidet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3c2413ed-8419-47f2-87f0-d7011a11cec6/585028834.pdfIn PDF document text
    • https://s3.amazonaws.com/pukaridimupo/xerox_altalink_b8055_system_administrator_guide.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc293fe0b6b03258f403ad0/t/5fc6ec4f3d56556d142f2979/1606872143552/boom_boom_football_gold_apk.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc007c924b06a7eb3fa3bc3/t/5fc0e90461e25426e159666c/1606478107958/11296074196.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_off0000daf2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAF2 5284 bytes
SHA-256: a85a0241d1b6f8edeaa8f5b6f038853d9310189eb48ec575d4c8f53717b0b1e7
font_01_sfnt_off0000ecd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECD8 10560 bytes
SHA-256: 5a3bd0249ff34d40c5b813ca40d43757445d4a8f4ca3f6f24b2bfab027360d9e

Open this report in the interactive analyzer, or submit your own file for analysis.