Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c153ba154ff292b…

MALICIOUS

PDF

84.1 KB Created: 2020-12-31 15:34:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5ca8699ce02c8143cb52cd7aee973bc5 SHA-1: 1de3a24c7aa18a30c7a2fb18c941e82e71044dcc SHA-256: 5c153ba154ff292b01ccb28b227aac0794e24926b78681e9e2117cbb542fe8a8
154 Risk Score

Malware Insights

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

The PDF file contains a link to a known malicious redirector, identified by the heuristic PDF_MALICIOUS_REDIRECTOR_LINK. The ML classifier also strongly flagged this PDF as malicious. The embedded URL, 'https://gettraff.ru/strik?utm_term=reverse+music+app+ios', is the primary indicator of malicious intent, likely serving as a lure for phishing or to download a secondary payload.

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/strik?utm_term=reverse+music+app+ios
    • https://cdn.sqhk.co/mekekomubun/RZJjaZX/connect_spinning_bike_to_zwift.pdf
    • https://cdn-cms.f-static.net/uploads/4463272/normal_5fbf5ecf53ace.pdf
    • https://kunubukom.weebly.com/uploads/1/3/4/5/134599245/121a4d2ca35f.pdf
    • https://padotugaladod.weebly.com/uploads/1/3/4/6/134615244/1263756.pdf
    • https://cdn-cms.f-static.net/uploads/4450350/normal_5fb4c6114158f.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/dfc8088d-e0ce-46ce-a66a-f34435fa3fff/agatha_christie_hercule_poirot_complete_short_stories.pdf
    • https://s3.amazonaws.com/rimepusox/radone.pdf
    • https://s3.amazonaws.com/juduk/ielts_writing_task_2_template.pdf
    • https://uploads.strikinglycdn.com/files/ecee08c1-0291-4ce4-bcf2-bbb224186e70/ginijibajesujamu.pdf
    • https://s3.amazonaws.com/jeponowon/67957163307.pdf
    • https://uploads.strikinglycdn.com/files/62ec3f32-cc58-47ee-91d0-27a1e7d48e0d/wibaruxubanozulipizuzufo.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f6a2.bin
f17815bc64f705f715f11d70101fbfd61bd28d7da97033f1c4ea8e6f46a55eec
pdf-font-stream PDF embedded font (sfnt) at offset 0xF6A2 5112 bytes
font_01_sfnt_off000107f9.bin
a19043fb5fb5c86368aa84de4bd5fc768acd3482dd50a46dccb7125a74142848
pdf-font-stream PDF embedded font (sfnt) at offset 0x107F9 10984 bytes
font_02_sfnt_off00012dc1.bin
b2563e85233037e3c2780690ed1455257f868516b5a962e54e6ffe29314c9cb1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12DC1 16312 bytes