Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e30d81c8f92cca2…

MALICIOUS

PDF

75.0 KB Created: 2020-12-25 06:23:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f64a60d69373a9df66e8c44eb28c7613 SHA-1: bb01f96e47d3d7ee212642563b5fb5a8db5eae1d SHA-256: 1e30d81c8f92cca23537b7523b65c4005bd17757579cc4db59ad2f5137417b36
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=adding+and+subtracting+decimals+worksheet+pdf'. The ML classifier also strongly flagged this PDF as malicious. Although no scripts were extracted, the presence of a malicious URL within the document body, combined with the heuristics, indicates a phishing or malware distribution attempt, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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/aws?utm_term=adding+and+subtracting+decimals+worksheet+pdf
    • https://cdn.sqhk.co/gobamagedesi/LDqRjcU/13013515387.pdf
    • https://static.s123-cdn-static.com/uploads/4365608/normal_5fdd485fe0d11.pdf
    • https://cdn.sqhk.co/naritiba/hjb51gj/sakisif.pdf
    • https://cdn-cms.f-static.net/uploads/4471509/normal_5fa41ffb969cd.pdf
    • https://static.s123-cdn-static.com/uploads/4393028/normal_5fe2edc696afb.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/lokijuronig/zilusorilolex.pdf
    • https://s3.amazonaws.com/kuboki/meaning_of_pupils_academic_performance.pdf
    • https://s3.amazonaws.com/zalisujezajaje/74546215656.pdf
    • https://uploads.strikinglycdn.com/files/7607a5f9-c9c6-449f-bf23-b93e0ec669ef/60745058973.pdf
    • https://uploads.strikinglycdn.com/files/f4351ef1-fd5d-45a2-8d52-026b010810f7/a_civil_action_movie_guide_answers_new_york_science_teacher.pdf
    • https://s3.amazonaws.com/kosamupim/necromancer_wizard_guide_5e.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d87e.bin
8fc2cd92be48af3a239569cdd0634bcbb9f36e4788f070e89ee909463313b475
pdf-font-stream PDF embedded font (sfnt) at offset 0xD87E 5736 bytes
font_01_sfnt_off0000ebd7.bin
0cd742e531c3678138bb5410c6c100ca79bdddcfd27eb9b13ae511b47bf3f10a
pdf-font-stream PDF embedded font (sfnt) at offset 0xEBD7 10736 bytes
font_02_sfnt_off000110ae.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f
pdf-font-stream PDF embedded font (sfnt) at offset 0x110AE 4324 bytes