Malicious PDF — malware analysis report

Static analysis result for SHA-256 069e43f4f22f9ed7…

MALICIOUS

PDF

70.2 KB Created: 2020-12-23 05:44:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 82c0404222adcb9b850bfffcd334f286 SHA-1: 79709f996af3997d45912d6344401dfce79e8260 SHA-256: 069e43f4f22f9ed7195723d1dc5241f990eea1b3e872a2eff9fc0366010b470a
214 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by multiple heuristics, including a critical finding for a redirector link to https://gettraff.ru/123. The file also contains a large number of embedded links, suggesting a link farm designed to obscure the ultimate malicious destination. The ML classifier output of 0.999766 further supports the malicious classification.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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=chapter+8+and+9+study+guide+biology
    • https://cdn-cms.f-static.net/uploads/4413016/normal_5f9bfbff0ed80.pdf
    • https://cdn-cms.f-static.net/uploads/4464065/normal_5fd7b3951f931.pdf
    • https://pisefipekopaz.weebly.com/uploads/1/3/4/4/134461515/7286261.pdf
    • https://static.s123-cdn-static.com/uploads/4446915/normal_5fdfafdf6254a.pdf
    • https://cdn-cms.f-static.net/uploads/4366982/normal_5f9a3d766d9ac.pdf
    • https://cdn-cms.f-static.net/uploads/4368266/normal_5f9697e2e1eb6.pdf
    • https://vaxajiwozoli.weebly.com/uploads/1/3/1/6/131637631/e9d237624.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static1.squarespace.com/static/5fc0f8f692c50b1a1e77efcd/t/5fc378fe9b1ed035384997b5/1606646015576/dapudobedojigefodumegajag.pdf
    • https://static1.squarespace.com/static/5fbfb2312cf09257bd651d14/t/5fc133604f983757200b3e78/1606497123293/biwegobidagid.pdf
    • https://static1.squarespace.com/static/5fc292a4e5c7695ca9a65d9d/t/5fcaf1821415195da07c1951/1607135620042/wedutonefujikewepitexe.pdf
    • https://static1.squarespace.com/static/5fe2702b65568422331fa094/t/5fe274c3d8781f4e3f3098f1/1608676548544/zuxilulal.pdf
    • https://s3.amazonaws.com/dozore/palo_alto_vm-_100_trial.pdf
    • https://static1.squarespace.com/static/5fc1c3d140f1034a5caf136a/t/5fcaab2c770cf42bdb8fe16e/1607117613521/inside_out_anger_homemade_costume.pdf
    • https://static1.squarespace.com/static/5fc5dad05e8e827d42afd83f/t/5fd22fbcd97b572b89e485be/1607610300639/zombie_tsunami_ios_hack_no_jailbreak.pdf
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd03f129c5e2669026bba7/1606222833754/vermont_country_store_cafe_curtains.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_off0000d36f.bin
ce8618b86a53aa8d68211f8ae0f50e7971a3f7b1ad6781e6a67c3870e8328f08		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD36F 5716 bytes
font_01_sfnt_off0000e6d2.bin
e99bf0bc5f506fa8470fe79a6609faa8e6ccea0e83cad42d6d59146ddceb661b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE6D2 10904 bytes

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