Malicious PDF — malware analysis report

Static analysis result for SHA-256 15dcc612c9b5f5fc…

MALICIOUS

PDF

55.1 KB Created: 2020-10-29 15:31:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cc759748da5868ed4286f5c9d397431e SHA-1: d71a69f5e78b88b5ccf74f4e14ab03dba4c8f2bb SHA-256: 15dcc612c9b5f5fcec8e73411580f2b495e2171d285ff508aedda5ea239cf7f3
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link T1059.007 JavaScript

This PDF document contains a large number of embedded links, many of which point to potentially malicious redirectors or SEO link farms. The primary malicious link identified is https://gettraff.ru/strik?keyword=ee+nagaraniki+emaindi+movie+online+watch+movierulz, which is flagged as a known malicious redirector. The document body itself contains garbled text mixed with some URLs, suggesting an attempt to disguise the malicious intent. The ML classifier strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • 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.
  • 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?keyword=ee+nagaraniki+emaindi+movie+online+watch+movierulz
    • https://vafumigoku.weebly.com/uploads/1/3/1/3/131384305/pewiredegaka.pdf
    • https://juporolo.weebly.com/uploads/1/3/1/3/131380745/7148739.pdf
    • https://keniwuki.weebly.com/uploads/1/3/1/4/131483234/bigunurusipota_vovavubavuw_malolipesafa.pdf
    • https://wevinavuligi.weebly.com/uploads/1/3/4/5/134505150/9001518.pdf
    • https://poxaneduwi.weebly.com/uploads/1/3/4/2/134234601/zozonezikakuwafu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/rowubunak/xizepijivesudawopujabine.pdf
    • https://uploads.strikinglycdn.com/files/8bf6066d-2ee6-438d-b665-af8ad539797e/rafesanazapiwotamavegip.pdf
    • https://s3.amazonaws.com/fasanag/darifabimibi.pdf
    • https://s3.amazonaws.com/viromibukoleliw/jupasatuzofugibiriwetije.pdf
    • https://uploads.strikinglycdn.com/files/786550d5-295c-459f-94bf-f93b901bab0f/wwe_2k14_ppsspp_android_download_highly_compressed.pdf
    • https://s3.amazonaws.com/wesezuzuvalirik/100uf_63v_electrolytic_capacitor_datasheet.pdf
    • https://s3.amazonaws.com/xanebavifamopez/beyond_compare_3_tutorial.pdf
    • https://uploads.strikinglycdn.com/files/d82c5136-5fee-46cc-9f86-62d8d972ac86/kewojelabudixaxipaguwe.pdf
    • https://s3.amazonaws.com/ditiruz/59548203643.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_off00009914.bin
611e2d8f26e3face7cea292af747f606c951603c6ab24595d9a408d4621f96f0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9914 5400 bytes
font_01_sfnt_off0000ab69.bin
d863515fb34bd7cbd055dee72015b6cfc371e4c564447e6ff1f73e9cd16f68b3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAB69 10552 bytes

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