Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f07b97f395c6b44…

MALICIOUS

PDF

74.3 KB Created: 2020-11-25 04:25:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: fa4451fa41da22d499af6ca5dfe1bb0f SHA-1: 1a79ed342877e818e848498ad6f44af92fdeb498 SHA-256: 1f07b97f395c6b44c9f55e561f5d960ce81e09549424d9845bd658ac7f255dd6
214 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by multiple heuristics and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded links, including one pointing to known malicious redirector infrastructure at `https://gettraff.ru/strik?utm_term=the+disability+studies+reader`. The presence of many external PDF links suggests a link farm or phishing campaign designed to redirect users to potentially harmful content. No scripts were extracted, but the overall structure and link analysis point to a phishing or malware distribution attempt.

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://gettraff.ru/strik?utm_term=the+disability+studies+reader In PDF document text
    • https://jidukuroji.weebly.com/uploads/1/3/4/0/134013204/jagiwewidigiboko.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416143/normal_5faf7dd2324a0.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/penale/cavinkare_annual_report.pdfIn PDF document text
    • https://s3.amazonaws.com/rorives/corel_draw_x5_activation_code.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f9074f3f-9137-44f1-a1c6-f2a15754c354/belefibeziwexonabamewa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/93b4adcc-df05-4ddb-bb51-f36fce236941/m16_service_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7410102f-3708-48a3-874d-19f17ce01c75/kinizejugoniboniso.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2aaecea3-1df0-4477-8ef3-0df55dedc3f6/new_leaf_perfect_town_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1e923049-522d-4ab6-b8df-12b8bcda29ae/introduction_to_health_physics_solution_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/844d2721-c4d2-45e3-8023-e6048dade7e5/56976043425.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b3d16ea-63b8-4621-96ed-b9f753205849/download_wind_river_full_movie.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_off0000e891.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE891 5104 bytes
SHA-256: 27957f3d6a04e60c309053e938cdcfafa3559d2d9e17d9ff1d59cbb17395bd57
font_01_sfnt_off0000f9e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9E5 10192 bytes
SHA-256: 08fe4ec805f92edc9d05856d9bb91d607300d22b041626b596afc24f60ec452e

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