Malicious PDF — malware analysis report

Static analysis result for SHA-256 70aaf9e992de53a0…

MALICIOUS

PDF

130.7 KB Created: 2021-01-06 14:21:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 1e3057678b46f2b497337c993b72b4a3 SHA-1: f3ca57d3ac7697f80e7b106d00f17da44b301f4f SHA-256: 70aaf9e992de53a0a51312d89b04cac7e8300e9ac2cac83202bdb84598cace33
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 'https://gettraff.ru/aws?utm_term=aoql+full+form'. The ML classifier also strongly flagged this PDF as malicious. While no scripts were extracted, the presence of a malicious URL within the document's structure indicates an attempt to lure the user to a harmful site, consistent with phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://gettraff.ru/aws?utm_term=aoql+full+form In PDF document text
    • https://cdn-cms.f-static.net/uploads/4412607/normal_5fa6575145f51.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470224/normal_5fec20a38092b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403808/normal_5ff11cef9fcf2.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/48373949-9037-4b81-a8b8-742735ed805f/81377948953.pdfIn PDF document text
    • https://s3.amazonaws.com/fedufiporara/saavn_mod_apk_download.pdfIn PDF document text
    • https://s3.amazonaws.com/geradi/google_play_services_kindle_fire.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/93b70598-ea54-42e4-8217-1e0545f65838/chinese_textbook.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/701872ba-ca31-49da-8b0e-189f071c1783/persona_3_fes_the_answer_length.pdfIn PDF document text
    • https://s3.amazonaws.com/tezofuretejom/75119829388.pdfIn PDF document text
    • https://s3.amazonaws.com/dukexajuj/47348771253.pdfIn PDF document text
    • https://s3.amazonaws.com/dusubonifu/16670184014.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/920e88bd-a77e-461e-b00e-b3b1d5ac211e/xabexawaxalijusuta.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e6f4a14-7173-4ab9-b4c2-cc9ca15e56b0/kodiak_alaska_real_estate.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_off0001c479.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C479 4640 bytes
SHA-256: 1408c54b8dfbccf7c4048a4d11ea447b47a46e9347b52b77d671f34dbd826810
font_01_sfnt_off0001d433.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D433 12152 bytes
SHA-256: a46c494c6746b3df7dc6a36f38d83404a20174028f9e96a0bb56ae75f9b4a119

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