Malicious PDF — malware analysis report

Static analysis result for SHA-256 bda0e8df7cce3cc2…

MALICIOUS

PDF

78.9 KB Created: 2020-11-09 18:06:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 3d41796396db5e9f94c422ef8d891a5b SHA-1: b40ba37892474646bcf76fd56053872aac9b2525 SHA-256: bda0e8df7cce3cc2af1224a5b8dd95c61c52fc2149b8f19b15a68babf92e50c3
214 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a significant number of embedded URLs, indicative of a link farm designed to manipulate search engine rankings or distribute malicious content. One of these URLs, 'https://gettraff.ru/aws?keyword=savoonga+alaska+school+district', is flagged as a known malicious redirector. The presence of numerous external links and the redirection to malicious infrastructure strongly suggests a phishing or malicious content distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://gettraff.ru/aws?keyword=savoonga+alaska+school+district In PDF document text
    • https://xedatuvigino.weebly.com/uploads/1/3/4/5/134580066/xavedixojofu.pdfIn PDF document text
    • https://jiwepurojal.weebly.com/uploads/1/3/0/7/130775762/nekuxarimomonizase.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371788/normal_5f991c30c031b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376098/normal_5f9200092fccd.pdfIn PDF document text
    • https://gevafitasib.weebly.com/uploads/1/3/1/3/131380901/c25f730.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368225/normal_5f95d7503b0a3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419194/normal_5f99cdf964738.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/ae5a9de4-f0c6-4e3b-b534-074172357a53/46551390627.pdfIn PDF document text
    • https://s3.amazonaws.com/zetare/english_conversation_lesson_plans.pdfIn PDF document text
    • https://s3.amazonaws.com/nosepevozux/the_simpsons_season_1_episode_1_hulu.pdfIn PDF document text
    • https://s3.amazonaws.com/jexijer/phalanges_fingers_joint.pdfIn PDF document text
    • https://s3.amazonaws.com/xakapudakadu/lego_hockey_rink_set.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_off0000f6a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6A9 5428 bytes
SHA-256: c0157c0294aa9113c4a5b4c1233be29670ac5e732715c5b95b0fbd8a0c0d88bd
font_01_sfnt_off0001091e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1091E 11384 bytes
SHA-256: d19671fb5ff3be7241d365d745b8420ea988ac91ab1f3ad95845f1e9cee403fa

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