Malicious PDF — malware analysis report

Static analysis result for SHA-256 87c739621ec62382…

MALICIOUS

PDF

76.3 KB Created: 2021-01-18 00:20:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 51e60ca31208617607cb9add0e5ccf31 SHA-1: d46d2f4d31cc9c183280700fd4dc30dd8e95246c SHA-256: 87c739621ec6238252f585cf08b4b7331ec2a5efae85c33173cd2293799866bf
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing indicating it links to known malicious redirector infrastructure. The embedded URL, 'https://gettraff.ru/123?utm_term=last+wish+guide+for+dummies', is the primary indicator of malicious intent. While no scripts were explicitly extracted, the PDF structure and the malicious URL suggest a phishing or malware delivery attempt, aligning with the Spearphishing Attachment technique.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/123?utm_term=last+wish+guide+for+dummies
    • https://cdn-cms.f-static.net/uploads/4412382/normal_5f9cdcf9d7518.pdf
    • https://cdn.sqhk.co/makevefix/Owhfjj7/star_wars_galaxy_map_legends.pdf
    • https://cdn-cms.f-static.net/uploads/4384483/normal_5fa72d8460b5a.pdf
    • https://cdn-cms.f-static.net/uploads/4424637/normal_5f9a1cb8f0863.pdf
    • https://site-1171785.mozfiles.com/files/1171785/4732166600.pdf
    • https://static.s123-cdn-static.com/uploads/4480387/normal_5ff93eca4ac40.pdf
    • http://rilotelexewobos.iblogger.org/adobe_reader_dc_2018_offline.pdf
    • https://cdn.sqhk.co/nalawanuxa/lgVgfic/90435827047.pdf
    • https://cdn-cms.f-static.net/uploads/4416805/normal_5fe64983584e2.pdf
    • http://penerete.66ghz.com/logic_breadboard_simulator_apk.pdf
    • https://site-1178820.mozfiles.com/files/1178820/flipper_bird_purple_shep.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/pizexopenaxu/bumapasejexugibo.pdf
    • http://gekavitominugi.epizy.com/apiparam_format_example.pdf
    • https://s3.amazonaws.com/suxugipipolazog/conjunction_punctuation_worksheet.pdf
    • http://daxevekiwenux.epizy.com/tween_machine_maya.pdf
    • https://s3.amazonaws.com/kevava/7483729196.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000efe3.bin
0ba0f569895b31ebe55b632254faa668d44ed0dd07c86aefd7f662ab7168c0d5
pdf-font-stream PDF embedded font (sfnt) at offset 0xEFE3 5320 bytes
font_01_sfnt_off000101ea.bin
d27679ad6af981940c56df1d47e099a970e1e194f9266fce34569de9cc4b1808
pdf-font-stream PDF embedded font (sfnt) at offset 0x101EA 10088 bytes