Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f65643fdb3fda1e…

MALICIOUS

PDF

73.7 KB Created: 2020-11-25 19:05:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: dd483b558faaf1600a50dcf504956c68 SHA-1: cd4b467e51e7f3032a9a1d02af0c0bfb7d167235 SHA-256: 7f65643fdb3fda1e36f8dd2f40239eb50ea71909d6bc55820e17568100d1422c
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=aaromale+malayalam+song'. The ML classifier also strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the nature of the redirector suggests an attempt to lure the user to a malicious site, likely for phishing or to download a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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=aaromale+malayalam+song In PDF document text
    • https://cdn-cms.f-static.net/uploads/4489056/normal_5fb8671a46885.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377678/normal_5fa6c355c6897.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384640/normal_5f9261898007c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379053/normal_5fa2de077779e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418963/normal_5f995b272b5f4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379377/normal_5f9c663c08b87.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373259/normal_5f8bea256bdf3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451567/normal_5fb30c6b8dbe2.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/panalipolifod/ielts_reading_time_to_transfer_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/jasadavebaga/vpn_windows_7_64_bit.pdfIn PDF document text
    • https://s3.amazonaws.com/jebokizez/sixibegekigopi.pdfIn PDF document text
    • https://s3.amazonaws.com/kuboki/34493099933.pdfIn PDF document text
    • https://s3.amazonaws.com/bofake/cuentos_de_barro_la_petaca.pdfIn PDF document text
    • https://s3.amazonaws.com/gazitif/android_tv_samsung_remote.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0000f790.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xF790 20636 bytes
SHA-256: b13059687b3f9d3350766abfa195f854f598373df34f30f9409f7279f1c9a88c
font_00_sfnt_off0000bff9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBFF9 5096 bytes
SHA-256: fee7af0cec1e468f0cc3825c509544e453c94b59002a98a6d0d9315dc36f58b3
font_01_sfnt_off0000d143.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD143 11152 bytes
SHA-256: 6d79b7e1865167022cb815c3d4300fe83ccc6352d8c3f90888d395bd95992aae

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